Question

Rumus suatu fungsi dinyatakan dengan f(x) = 3 + ax. jika f(a + 1) = a^2 - 2, nilai a = ...?
tolong dengan cara

Answer 1

F (x) = 3 + ax
f (a + 1) = 3 + a(a + 1)

= 3 + a² + a

3 + a² + a = a² - 2
a² - a² + a = -2 - 3
a = -5