FUNCTION QUESTIONS AND SOLUTIONS

High school mathematics lesson. Functions subject. Addition, subtraction, multiplication and division operations with functions. Finding the inverse of a function. Questions and its solutions.



Question 1

f(2x + 10) = 6x + 14

The f(x) function is equal to which of the following?


A) x + 12                B) 3x – 16                C) 2x + 5

D) 5x + 8                E) 2x - 7


Question 2

f(x) is a function that defined in real numbers.

f(x) = 12x – 36 

f-1 (x) is which of the following?

Funtion-t1-q2


Question 3

f(x) is a function that defined in real numbers.

f(x) = 16x + 24

f-1 (x) is which of the following?

Funtion-t1-q3


Question 4 

f(x) is a function that defined in real numbers.


f(x) =12x - 8
5




What is function f-1 (x) ?

Funtion-t1-q4


Question 5

f-1(x) = x + 9
4




What is value of the f(5)?


A) 3                B) 5                C) 7

D) 11              E) 13


Question 6

f(x) = 6x2 + 4

g(x) = 5x + 3

Funtion-t1-q6


A) 20                 B) 26                  C) 32

D) 38                E) 46


Question 7 

Functions f(x) and g(x) is defined in the real numbers.


f(x) = 3x + 24

g(x) = 5x – 8

What is value of the fog(x) ?


A) 75x – 16                      B) 10x + 16              C) 15x

D) 5x + 12                       E) 5x


Question 8 

f(x) = x2 – 4x

g(x) = x + 2


What is the value of the function [fog]-1 (21) ?

A) 3                      B) 5                  C) 9

D) 16                    E) 21


Question 9 

[gof](x + 6) = 5x + 11

f-1(x) = x + 1


What is value of the g(5)?

A) 15                 B) 11               C) 8

D) 5                  E) 1


Question 10

Funtion-t1-q10

What is the value of f-1 (2)?


A) 16                B) 23                 C) 30

D) -16               E) -30


Question 11

fog(x) = 6x2 – 4

f(x) = 2x + 6


The function g(x) is which of the following?


A) 5x + 7                   B) x2 – 8                C) 3x2 – 5

D) 5x2 + 3                 E) 6x + 5


Question 12 

For a function f(x) that defined in real numbers cluster,

f(x + g(x)) = x2  + 6

Also,

g(2) = 12


According to given in above, what is the value of f-1(10) ?

A) 32                    B) 25                   C) 20

D) 18                    E) 14


Solutions of These Questions



RISE KNOWLEDGE

06/10/2018

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