Question

Diketahui suatu fungsi f(x) = 2x + 3 . jika f(a) =-11,nilai a adalah?

Answer 1

F(x) = 2x +3
f(a) = 2(a) +3 = -11
       = 2a +3 = -11
       = 2a = -11 -3
       = 2a = -14
       = a = -14/2
       = a = -7

Jadi, nilai a adalah -7.

Answer 2

F(x)=2x+3
f(a) = 2a+3 = -11
2a= -14
a= -14/2 = -7