Analyzing Functions Using Derivatives Assessment Test

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We can analyse functions by using the first and the second derivative of a function. Take this assessment test to evaluate your knowledge of how to analyse functions using derivatives.

• 1.

To state function that value of variable y is determined by variable of x is written as...

• A.

F = (x)y

• B.

X = Æ’(y)

• C.

Y = Æ’(x)

• D.

F = (y)x

C. Y = Æ’(x)
Explanation
The given function states that the value of variable y is determined by the variable x. This can be understood by the equation y = Æ’(x), where the function Æ’ relates the value of y to the value of x. Therefore, the correct answer is y = Æ’(x).

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• 2.

Real world phenomena if shown as mathematical representation then it is called...

• A.

Phenomenal model

• B.

Representational model

• C.

Mathematical model

• D.

Real model

C. Mathematical model
Explanation
A mathematical model is the correct answer because it refers to the representation of real-world phenomena using mathematical equations or formulas. This allows scientists and researchers to study and analyze these phenomena in a more precise and systematic way. Mathematical models help in making predictions, understanding complex systems, and testing hypotheses. They provide a simplified and abstract representation of reality, making it easier to analyze and manipulate data.

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• 3.

Significant models to explain mathematical relationships are represented by...

• A.

Constant functions

• B.

Functions

• C.

Model function

• D.

Exponent function

B. Functions
Explanation
The significant models to explain mathematical relationships are represented by functions. Functions are mathematical entities that represent the relationship between input values and output values. They can be used to describe various mathematical phenomena such as linear relationships, exponential growth, or trigonometric patterns. Functions provide a systematic way to understand and analyze mathematical relationships, making them essential tools in mathematics and other scientific disciplines.

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• 4.

In solving mathematical problems, mathematical function work as...

• A.

Input-output device

• B.

Output-input device

• C.

Solving function

• D.

Terminating function

A. Input-output device
Explanation
A mathematical function works as an input-output device because it takes an input value or set of values and produces an output value or set of values based on a specific rule or relationship. Just like an input-output device, a mathematical function processes the input and generates the corresponding output, allowing us to analyze and understand the relationship between the two.

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• 5.

Function is a rule of mathematics in which one input value has...

• A.

Many output value

• B.

Two output value

• C.

Three output value

• D.

One output value

A. Many output value
Explanation
A function is a mathematical rule that maps each input value to a unique output value. However, there are cases where multiple input values can produce the same output value. In such cases, the function has many output values. This means that for certain inputs, the function can produce multiple corresponding outputs, making "Many output value" the correct answer.

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• 6.

Given a function g(x), if g'(x)=0 at a certain value of x, then g(x) has _________ at x.

• A.

An inflection point

• B.

A critical point

• C.

A minimum

• D.

A maximum

B. A critical point
Explanation
If the derivative of g(x) is equal to 0 at a certain value of x, it means that the slope of the function at that point is 0. This indicates a critical point, where the function may have a minimum, maximum, or an inflection point. However, without further information about the behavior of the function on either side of the critical point, it is not possible to determine whether it is a minimum, maximum, or an inflection point. Therefore, the correct answer is a critical point.

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• 7.

For a function f(x), f''(4)=0 indicates that x=4 is...

• A.

An inflection point

• B.

A critical point

• C.

A relative minimum

• D.

A relative maximum

A. An inflection point
Explanation
When the second derivative of a function is zero at a specific value of x, it indicates that the function may have an inflection point at that point. An inflection point is a point on the curve where the function changes concavity, going from being concave up to concave down, or vice versa. Therefore, f''(4)=0 suggests that x=4 is an inflection point.

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• 8.

For a function f(x), f'(-3) = 5 indicates f(x) is ___________ at x=-3.

• A.

Decreasing

• B.

Increasing

• C.

Concave up

• D.

Concave down

B. Increasing
Explanation
If the derivative of a function at a specific point is positive (in this case, f'(-3) = 5), it indicates that the function is increasing at that point. This means that as x approaches -3, the value of f(x) is getting larger.

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• 9.

The slope of a function is described by its...

• A.

Second derivative

• B.

Third derivative

• C.

First derivative

• D.

Expression

C. First derivative
Explanation
The slope of a function is described by its first derivative. The first derivative represents the rate of change of the function at any given point. It gives us information about how the function is changing, whether it is increasing or decreasing, and the steepness of the curve at a specific point. Therefore, the first derivative is the correct answer to describe the slope of a function.

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• 10.

The concavity of a function is described by its...

• A.

First derivative

• B.

Second derivative

• C.

Expression

• D.

Third derivative

B. Second derivative
Explanation
The concavity of a function is described by its second derivative. The second derivative determines whether the function is concave up or concave down. If the second derivative is positive, the function is concave up, meaning it curves upward. If the second derivative is negative, the function is concave down, meaning it curves downward. The second derivative also helps identify points of inflection, where the concavity changes.

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