Let the derivative function of F [x] on R be f "[x], and 2F [x] + XF" [x] > x ^ 2. Find the size relation of F [x] and X, and the sum of F [x] Suppose that the derivative of F [x] on R is f '' [x], and 2F [x] + XF '' [x] > x ^ 2, find the size relationship between F [x] and X, and the size of F [x] and X That's the title Do it yourself.

Let the derivative function of F [x] on R be f "[x], and 2F [x] + XF" [x] > x ^ 2. Find the size relation of F [x] and X, and the sum of F [x] Suppose that the derivative of F [x] on R is f '' [x], and 2F [x] + XF '' [x] > x ^ 2, find the size relationship between F [x] and X, and the size of F [x] and X That's the title Do it yourself.

The landlord should have a good look at whether the title is clear, or there are other conditions and wrong numbers
If we only rely on the above conditions, the result can not be judged
give an example:
F (x) = 1 / 2, X & sup2; + 1 / 4 and f (x) = x & sup2; + 1
But the results are quite different