problems with integration

[Thomas Klemm]

(12-08-2014 02:19 AM)Han Wrote:  \[ \int_{x_0}^x (x-a)^n\ dx \]

You mustn't use the same variable \(x\) both as the upper limit and control variable of the integration.
That would be similar to write in C:

Code:

for (x = 0; x < x; x++) {
  
}

You can simply use another variable name like \(t\):
\[ \int_{x_0}^x (t-a)^n\ dt \]