Question

Suatu fungsi di nyatakan dengan rumus
f (y) = 3y + 4y - a . jika f (2) =-7 maka a adalah. ...

Answer 1

F(y)= 3y+4y-a
f(2) =3.2+4.2-a= -7
         6+8-a=-7
           a= 21

Answer 2

f (2) = 3(2) + 4(2) -a
-7 = 6 + 8 -a
-7 = 14 -a
-7 -14 = -a
-21 = -a
21 = a