How To Find F(X)

This is an MCQ-based quiz for GRE on How To Find F(X).

In general, given the function, f(x), its zeros can be found by setting the function to zero. The values of x that represent the set equation are the zeroes of the function. To find the zeros of a function, find the values of x where f(x) = 0.

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If f(x)=3x and g(x)=2x+2, what is the value of f(g(x)) when x=3?

24 20 18 22

g(x) = 4x – 3 h(x) = .25πx + 5 If f(x)=g(h(x)). What is f(1)?

π + 17 4 19π – 3 13π + 3 42

If 7y = 4x - 12, then x =

(7y+3)/12 (7y+12)/4 (7y+12)/3 (7y-12)/4

If F(x) = 2x^2 + 3 and G(x) = x – 3, what is F(G(x))?

2x^2 6x^2 – 12x 2x^2 – 12x +21 2x^2 + 12x +18 6x^2 + 5x

If a(x) = 2x^3 + x, and b(x) = –2x, what is a(b(2))?

132 128 –503 –132 503

Let F(x) = x^3 + 2x^2 – 3 and G(x) = x + 5.  Find F(G(x))

x^3 + 17x^2 + 95x + 172 x^3 + 2x^2 – x – 8 x^3 + x^2 + 2 x^3 + x^2 + x + 8 x^3 + 2x^2 + x + 2

What is the value of xy^2(xy – 3xy) given that x = –3 and y = 7?

2881 –6174 3565 –2881

f(x)=x^2+32x−12

What is f(4)?

128

132

130

144

156

f(x)=x^2+2

g(x)=x−4

Find g(f(2)).

4

1

3

2

6

It takes no more than 40 minutes to run a race, but at least 30 minutes. What equation will model this in m minutes?

|m−35|=5

|m+35|<5

|m−35|<5

|m+35|>5

|m−35|>5

Quiz/Test Summary
Title: How To Find F(X)
Questions: 10
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