diketahui fungsi f:x -> 3x-2. jika f(a)=-8 maka nilai a adalah... *pake cara please

Question

Matematika Diposting : 2017-04-04 Diupdate : 2022-05-22 chanieraoktary

Pertanyaan

diketahui fungsi f:x -> 3x-2. jika f(a)=-8 maka nilai a adalah...

*pake cara please

Answer 1

f(a) = -8
3a - 2 = -8
3a = -6
a = -2

Answer 2

f(x)=3x-2
f(a)=3a-2=-8
   = 3a   = -8+2
   = 3a = -6
   = a = -2