Question

Diketahui f ( x ) = ( x + a ) + 3 dan f ( 2 ) = 7 tentukan ;
a. bentuk fungsi f ( x )
b. nilai f ( - 1 )
c. nilai f ( -2 ) + f ( - 1 )

Answer 1

F(x) = x + a + 3
f(2) = 7

a. 2 + a + 3 = 7
             a   = 7 - 2 - 3
                  = 2

b, f(-1) = -1 + 2 + 3 = 4

c, f(-2) + f(-1) = (-2 + 2 + 3) + (-1 + 2 + 3)
                   = 3 + 4 = 7