Question

Diketahui fungsi g(x) = ax² + bx. jika g(2) = -2 dan g(-3) = -42, nilai g(-1) - 4=……………

Answer 1

G(x) = ax²+bx
g(2) = 4a+2b = -2
g(-3) = 9a-3b =c-42

-1-2a = 14+3a
5a = -15
a = -3 sehingga b = 5

g(x) = -3x²+5x
g(-1)-4 = -3-5-4 = -12