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!!
