int('(1-1/x^2)*sqrt(x*sqrt(x))','x')
4
int('x^2*exp(x)','x') 二．定积分 1 ?2?x2exdx=________
int('sqrt(2*x-x^2)','x',0,2)
02x?x2dx2. 比较
?12ex12d2 , ，
xint('exp(x)','x',2,1) ，?int('exp(x^2)','x',2,1)
12exdx?(1?x)dx． int('(1+x)'
,'x',2,1)
x3. 若 ，求出f(x)
int('exp(-t^2)',t,x,x^2)
??dx?24. 计算0x?4x?3．
f(x)??e?tdtx22int('1/(x^2+4*x+3)','x',0,inf)