Suppose another variable X is continuous and its pdf is:
f(x)= (x^3 + x^2 - 2/3x + .75) 0 < x < 1
For this question, you may take our word that f(x) is greater than or equal to zero for all values of x in the domain. Prove the other condition that will make this a legitimate pdf.
Basically I have to prove that that equals 1 but im confused on how.