Question

Suatu fungsi dengan rumus f(x)=3x²+2,jika f(a)=14. tentukan nilai a!

Answer 1

F(x)=3x∧2+2
f(a)=3a∧2+2
14=3a∧2+2
14-2=3a∧2
12=3a∧2
a∧2=4
a=√4
a=2

Answer 2

F(x) = 3x² + 2
f(a) = 3a² + 2 = 14
      = 3a² = 14 - 2
      = 3a² = 12
      = a² = 12 ÷ 3
      = a² = 4
      = a = 2