Question

Jika f(x)=9x+(a+6) dan f(1)=16,tentukan nilai f(a) dan f(2)
pake jln nya y

Answer 1

F(x) = 9x + (a+6)
f(1) = 16
9.1 + a + 6 = 16
a + 15 = 16
a = 1

f(x) = 9x + 7

f(a) = f(1) = 16

f(2) = 9×2 + 7
= 18 + 7
= 25

Answer 2

F(1) = 9(1) + (a+6) = 16
f(1) = 9 + a + 6 = 16
f(1) = 15 + a = 16
                a = 16 - 15
                a = 1

f(a) = 9(a) + a + 6
f(a) = 9a + a + 6
f(a) = 10a + 6
f(a) = 10(1) + 6
f(a) = 16

f(2) = 9(2) + a + 6
f(2) = 18 + a +6
f(2) = 24 + a
f(2) = 24 + 1 = 25