cho ham so y =f(x) = 4x+5
a, tinh f(-2,5); f (3) ; \(f\left(\dfrac{-3}{2}\right)\)
b , tim x khi f (x) = 2 ;f(x) =\(\dfrac{-1}{3}\) ; f(x) = 0
c, cac diem A (1;9);B (-2 ;3) ;C (3 ; 17); D(-3;7) diem nao thuoc do thi ham so
giup minh nhe minh dang can gap (luu y chi giai minh cau c ,cac cau khac minh lam roi)