Question

If f(x) = |2x - 4|, find f(-7)

Answer 1

f(-7)= |2(-7) - 4|= |-14-4|= |-18|= 18

Answer 2

hey there!!

Given :

f ( x ) = l 2x - 4 l , find f ( - 7 )

We will have to substitute the value of -7 instead of x

f ( -7 ) = l -14 - 4 l

f ( -7 ) = l -18 l

As the value in a mod shall always be positive, the answer would become 18

Hence, the required answer is 18

Hope my answer helps!!