Question

11.find the value of f(x) = 3x - 5 when x =4.

A. 43
B. 7
C.-1
D.-5
12.Given f(x) = x + 1 and g(x) =x + 2, which of the following value corresponds to (f o g)4?
A.4
B.5
C.6
D.7
​

Answer 1

11. f(x) =3x-5

put x = 4 as given in question

ie:

f(4)= 3(4)-5

=12-5

=7

Answer 2

11. B. 12.D

Explanation:

f(4) = 3(4)-5

=7

12.

(fog)4 = f(g(4))

(g(4)= 4+2

=6).

f(6)= 6+1

=7