the functionf(X) has the property that f(2x+3)=2f(x)+3, xER find the value of f(3) f(9) f(-3) any help will be appreciated ty
f(3) = f(2*0 +3) = 2 f(0) + 3 = 2*6+3 = 15 f(9) = f(2*3+3) = 2 f(3) + 3 = 2*15+3 = 33 f(-3) = f(2*-3 + 3) = 2 f(-3) + 3 f(-3) = 2 f(-3) + 3 0 = f(-3) + 3 f(-3) = -3