Which of the following is not a polynomial?
x+ x2
x+ √3
3√y + y2
x
3√y has a degree of 13, which is not a positive integer and hence it is not a polynomial.
Find the interval in which the following functions are strictly incerasing or decreasing
x2+2x−5
10−6x−2x2
−2x3−9x2−12x+1
6−9x−x2
(x+1)3(x−3)3