Question

15. If f(x) = 5x + 7, find f{f(x)}.​

Answer 1

Answer:

first method to solve this question :-

when x =0

then, 5*0+7

=0+7

=7

when x =1

then,5*1+7

=5+7

=12....

now u can find other values of x

second method to solvne this question:-

$5x + 7 = 0 \\ 5x = - 7 \\ x = \frac{ - 7}{5}$

now f{f(x)}

$5x + 7(5x + 7)( \frac{ - 7}{5} ) \\ 5x + 35x + 49 - \frac{7}{5}$