1.function f(x) about X 2.the indefinite integral of function f(x)=3x²+1 is F(x)=x³+x+C 3.the definite integral of function f(x)=5x¼ on interval [0,16] equals to the difference between the function value of original function at x=16 and the function value of F(0) at x=0,which is 128 4.the function value f(2) of f(x) at x=2