1The derivative of by first principle is defined as which of the following?
derivatives by first principle
Easy
A.
B.
C.
D.
Correct Answer:
Explanation:
By definition, the derivative from first principle is .
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2Using first principle, the derivative of is:
derivatives by first principle
Easy
A.
B.
C.
D.
Correct Answer:
Explanation:
.
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3According to the product rule, equals:
algebra of derivative of functions
Easy
A.
B.
C.
D.
Correct Answer:
Explanation:
The product rule states .
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4The quotient rule for is:
algebra of derivative of functions
Easy
A.
B.
C.
D.
Correct Answer:
Explanation:
The quotient rule is .
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5The derivative of a constant function is:
algebra of derivative of functions
Easy
A.
B.
C.
D.
Correct Answer:
Explanation:
The derivative of any constant is zero since it does not change with .
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6If a function is differentiable at a point, then at that point it is necessarily:
differentiability
Easy
A.Discontinuous
B.Constant
C.Undefined
D.Continuous
Correct Answer: Continuous
Explanation:
Differentiability implies continuity, though the converse is not always true.
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7The function is not differentiable at which point?
differentiability
Easy
A.
B.
C.
D.
Correct Answer:
Explanation:
At , the left-hand and right-hand derivatives of differ, so it is not differentiable there.
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8The derivative of is:
derivatives of composite functions
Easy
A.
B.
C.
D.
Correct Answer:
Explanation:
Using the chain rule, .
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9If , then according to the chain rule equals:
chain rule
Easy
A.
B.
C.
D.
Correct Answer:
Explanation:
The chain rule gives .
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10The derivative of with respect to is:
chain rule
Easy
A.
B.
C.
D.
Correct Answer:
Explanation:
By the chain rule, .
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11For the equation , differentiating implicitly gives :
derivatives of implicit functions
Easy
A.
B.
C.
D.
Correct Answer:
Explanation:
Differentiating: , so .
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12In implicit differentiation of a function of and , the derivative of with respect to is:
derivatives of implicit functions
Easy
A.
B.
C.
D.
Correct Answer:
Explanation:
Applying the chain rule, .
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13The derivative of with respect to is:
derivatives of inverse trigonometric functions
Easy
A.
B.
C.
D.
Correct Answer:
Explanation:
The standard result is .
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14The derivative of with respect to is:
derivatives of inverse trigonometric functions
Easy
A.
B.
C.
D.
Correct Answer:
Explanation:
The standard result is .
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15The derivative of with respect to is:
derivatives of exponential and logarithmic functions
Easy
A.
B.
C.
D.
Correct Answer:
Explanation:
The exponential function is its own derivative: .
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16The derivative of (natural log) with respect to is:
derivatives of exponential and logarithmic functions
Easy
A.
B.
C.
D.
Correct Answer:
Explanation:
The derivative of is for .
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17Logarithmic differentiation is most useful for differentiating functions of the form:
logarithmic differentiation
Easy
A.
B.
C.
D.
Correct Answer:
Explanation:
When both base and exponent are variable, taking logarithms first simplifies the differentiation.
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18If and , then equals:
derivatives of functions in parametric forms
Easy
A.
B.
C.
D.
Correct Answer:
Explanation:
For parametric functions, , provided .
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19The second order derivative of with respect to is written as:
second order derivatives
Easy
A.
B.
C.
D.
Correct Answer:
Explanation:
The second order derivative is denoted , obtained by differentiating again.
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20If , then the second order derivative is:
second order derivatives
Easy
A.
B.
C.
D.
Correct Answer:
Explanation:
First derivative , and differentiating again gives .
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21Using the first principle, the derivative of is:
derivatives by first principle
Medium
A.
B.
C.
D.
Correct Answer:
Explanation:
By first principle, . Rationalizing gives .
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22Using the first principle, the derivative of is:
derivatives by first principle
Medium
A.
B.
C.
D.
Correct Answer:
Explanation:
. Using the sum-to-product identity, this simplifies to .
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23If , then equals:
algebra of derivative of functions
Medium
A.
B.
C.
D.
Correct Answer:
Explanation:
By quotient rule, .
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24If , then is:
algebra of derivative of functions
Medium
A.
B.
C.
D.
Correct Answer:
Explanation:
By product rule, .
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25The function is:
differentiability
Medium
A.Neither continuous nor differentiable at
B.Differentiable everywhere
C.Differentiable only at
D.Continuous everywhere but not differentiable at
Correct Answer: Continuous everywhere but not differentiable at
Explanation:
The modulus function is continuous everywhere. At the left-hand derivative is and the right-hand derivative is , so they differ and is not differentiable there.
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26For what value of is differentiable at ?
differentiability
Medium
A.
B.
C.
D.
Correct Answer:
Explanation:
Continuity at requires , so . Checking derivatives: left and right match, so works.
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27If , then is:
derivatives of composite functions
Medium
A.
B.
C.
D.
Correct Answer:
Explanation:
Differentiating the composite function, .
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28The derivative of with respect to is:
derivatives of composite functions
Medium
A.
B.
C.
D.
Correct Answer:
Explanation:
.
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29If , then equals:
chain rule
Medium
A.
B.
C.
D.
Correct Answer:
Explanation:
Using the chain rule, .
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30If , then is:
chain rule
Medium
A.
B.
C.
D.
Correct Answer:
Explanation:
using .
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31If , then is:
derivatives of implicit functions
Medium
A.
B.
C.
D.
Correct Answer:
Explanation:
Differentiating implicitly: , so .
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32If , then equals:
derivatives of implicit functions
Medium
A.
B.
C.
D.
Correct Answer:
Explanation:
Differentiating : , giving .
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33The derivative of with respect to is:
derivatives of inverse trigonometric functions
Medium
A.
B.
C.
D.
Correct Answer:
Explanation:
. With , .
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34If , then is:
derivatives of inverse trigonometric functions
Medium
A.
B.
C.
D.
Correct Answer:
Explanation:
. With , .
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35The derivative of is:
derivatives of exponential and logarithmic functions
Medium
A.
B.
C.
D.
Correct Answer:
Explanation:
.
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36If , then equals:
derivatives of exponential and logarithmic functions
Medium
A.
B.
C.
D.
Correct Answer:
Explanation:
For , the derivative is . Hence .
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37If , then is:
logarithmic differentiation
Medium
A.
B.
C.
D.
Correct Answer:
Explanation:
Taking log: . Differentiating, , so .
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38If , then equals:
logarithmic differentiation
Medium
A.
B.
C.
D.
Correct Answer:
Explanation:
Taking log: . Differentiating: , so .
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39If and , then is:
derivatives of functions in parametric forms
Medium
A.
B.
C.
D.
Correct Answer:
Explanation:
and . So .
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40If , then is:
second order derivatives
Medium
A.
B.
C.
D.
Correct Answer:
Explanation:
and .
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41Using the first principle, the derivative of is:
derivatives by first principle
Hard
A.
B.
C.
D.
Correct Answer:
Explanation:
Writing and applying the first principle gives .
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42By first principle, equals:
derivatives by first principle
Hard
A.
B.
C.
D.
Correct Answer:
Explanation:
Using the limit definition (or chain rule as its consequence), .
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43The number of points in where is NOT differentiable is:
differentiability
Hard
A.
B.
C.
D.
Correct Answer:
Explanation:
Each absolute value term is non-differentiable at its corner: , , and . These points are distinct and no cancellation smooths them, so fails to be differentiable at exactly points.
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44Let for and . Which statement is true?
differentiability
Hard
A. is continuous but nowhere differentiable
B.
C. does not exist
D. and is differentiable everywhere
Correct Answer: and is differentiable everywhere
Explanation:
since . For the product rule applies, so is differentiable everywhere.
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45If , then equals:
algebra of derivative of functions
Hard
A.
B.
C.
D.
Correct Answer:
Explanation:
Since , we get . By the product rule, .
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46If , then is:
derivatives of composite functions
Hard
A.
B.
C.
D.
Correct Answer:
Explanation:
Chain rule through three layers: .
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47If , then equals:
chain rule
Hard
A.
B.
C.
D.
Correct Answer:
Explanation:
By the chain rule, .
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48If , then equals:
derivatives of implicit functions
Hard
A.
B.
C.
D.
Correct Answer:
Explanation:
Taking logs: . Differentiating: , so . Simplifying gives .
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49If , then equals:
derivatives of implicit functions
Hard
A.
B.
C.
D.
Correct Answer:
Explanation:
Differentiating both sides: . Then , giving .
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50If , then equals:
derivatives of inverse trigonometric functions
Hard
A.
B.
C.
D.
Correct Answer:
Explanation:
Put . Then , so . Hence .
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51If for , then equals:
derivatives of inverse trigonometric functions
Hard
A.
B.
C.
D.
Correct Answer:
Explanation:
Dividing by : . So and .
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52The derivative of is:
derivatives of exponential and logarithmic functions
Hard
A.
B.
C.
D.
Correct Answer:
Explanation:
Applying the chain rule outward: .
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53If , then equals:
logarithmic differentiation
Hard
A.
B.
C.
D.
Correct Answer:
Explanation:
Take logs: . Differentiating: , so .
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54If , then equals:
logarithmic differentiation
Hard
A.
B.
C.
D.
Correct Answer:
Explanation:
. Then , giving .
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55For the cycloid , , equals:
derivatives of functions in parametric forms
Hard
A.
B.
C.
D. with opposite sign
Correct Answer:
Explanation:
, . So .
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56If and , then equals:
derivatives of functions in parametric forms
Hard
A.
B.
C.
D.
Correct Answer:
Explanation:
Here . Then .
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57If , then equals:
second order derivatives
Hard
A.
B.
C.
D.
Correct Answer:
Explanation:
; differentiating again, .
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58If , which relation holds?
second order derivatives
Hard
A.
B.
C.
D.
Correct Answer:
Explanation:
, so . Squaring: . Differentiating and dividing by gives .
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59If and , then equals:
derivatives of functions in parametric forms
Hard
A.
B.
C.
D.
Correct Answer:
Explanation:
, . Thus .
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60If for , then equals:
derivatives of inverse trigonometric functions
Hard
A.
B.
C.
D.
Correct Answer:
Explanation:
Put ; then . In the given range , so .
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