Question

Tentukan invers fungsi berikut
a.f(x)=x-3/2x+1
b.f(x)=x-2/x-3
c.f(x)=2-3x/3x
d.f(x)=x/x+3
tolong di bantu soalnya besok udh di kumpul please........

Answer 1

A.f(x)=x-3/2x+1
y =x-3/2x+1
2xy +y =x-3
2xy - x = -y -3
x(2y -1) =-y -3
f(x)' = (-y-3)/ (2y-1)


b.f(x)=x-2/x-3

y =x-2/x-3
xy -3y =x-2

xy - x = 3y-2
x(y -1) =3y -2
f(x)' = (3y-2)/ (y-1)


c.f(x)=2-3x/3x

y=2-3x/3x
3xy=2-3x
3xy + 3x =2
x(3y + 3) = 2
f(x)' = 2/(3y+3)