1/x^2乘以sin(1/x)从二分之派到正无穷的广义积分

Question

1/x^2乘以sin(1/x)从二分之派到正无穷的广义积分

Answer 1

∫sin(1/x)/x²dx=-∫sin(1/x)d(1/x)
=[cos(1/x)]│
=1-0
=1.