Question

Suatu pemetaan mempunyai rumus f(x) = 2x-5 per x+3. bila f(a) = -5, maka nilai a =

Answer 1

         = -5
=> 2x - 5 = -5 .(x+3)
=> 2x - 5 = -5x -15
=> 2x + 5x = -15 + 5
=> 7x = -10
jadi , a = -10/7

" semoga bermanfaat

Answer 2

Diketahui : f(x) = (2x-5)/(x+3). jika f(a) = -5, maka nilai a=....
Jawab:

Ubah variabel x dengan variabel a.

f(a)= (2a-5)/(a+3) = -5
f(a)= 2a-5   = -5(a + 3)
f(a)= 2a-5   = -5a-15
f(a)= 2a+5a= 5-15
f(a)= 7a      = -10
f(a)= a        =-