F (x)=2x* (-3), jika f (a) = 3 dan f (3) = b maka a+b adalah Mohon bantuan nya

[tex]f(x) = 2x \times ( - 3) = - 6x \\ f(a) = 3 \\ f(a) = - 6a \\ 3 = - 6a \\ a = \frac{3}{ - 6} = - \frac{1}{2} [/tex]
[tex]f(x) = - 6x \\ f(3) = b \\ f(3) = - 6(3) \\ b = - 18[/tex]
maka
[tex]a + b = - \frac{ 1}{2} + ( - 18) \\ = - \frac{1}{2} - 18 \\ = \frac{ - 1 - 36}{2} = - \frac{37}{2} [/tex]
semoga bermanfaat