Question

if f(x)=4x-5/3x-4, then show that f(x)=x

Answer 1

Step-by-step explanation:

here we go with proof

given f(x)= (4x-5)/(3x-4)

let us consider x= 1,then f(1)

f(1)=(4(1)-5)/(3(1)-4)

f(1)=(4-5)/(3-4)

f(1)=(-1)/(-1)

f(1)=1

hence f(1)=1 then f(x)=x