" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
f (2x) = (2x)^2 + 2x
= 4x^2 + 2x
f (1) = 1^2 + 1 = 2
f (-1) = (-1)^2 + 1 = 2