The equation is  .

Here the integrand is .

From the property  of integrals: If , then .

Therefore, .

Here integral result is wrong since it is a negative value.

Fundamental theorem of calculus can be applied to the continuous functions only, but here the integrand function is not continuous at .

Therefore,  doesnot exist.

Fundamental theorem of calculus can be applied to the continuous functions only, but here the integrand function is not continuous at .