Question

considerando as funções f e g tal que f(x) = x + 7 é g (x) = x-9 determine: a- (fog)(x) b- (gof)(x) c- (fog)(2) d- (gof)(-2)

Answer 1

a) - (fog)(x) = x-9+7 = x-2

b) - (gof)(x) = x+7-9 = x-2

c) - (fog)(2) = 2-9+7 = 0

d) - (gof)(-2) = -2+7-9 = -4