(i)The integral mean value theorem:if the function f(x)in the closed intervalcontinuous on [a,b],the na[a,b],there are at least a bit can bef(x)dx =f(m)(b-a)(i)If the function p(x)has the second derivative,and satisfies.9(2)p(1),(2)>p(x)dxthen there is at least a point E(1,3)such that p"()<0.