The solution is in the attachement of the file
1 5 1
welcome if u like it na give it as best
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I = 
 \int\limits^1_0 {(3x^{\frac{3}{2}}+6x^{\frac{1}{2}}}) \, dx =  [ 3\ \frac{x^{\frac{5}{2}}}{\frac{5}{2}} +6\ \frac{x^{\frac{3}{2}}}{\frac{3}{2}}]_0^1\\ \\ = [ \frac{6}{5} x^{\frac{5}{2}}+4x^{\frac{3}{2}}]_0^1\\ \\\frac{6}{5}+4=\frac{26}{5}=5.2\\

1 5 1
IT is easy sir
I also got 26/5 answer
But in the book they gave the answer as 5/26
I think it is printing mistake
thanx n u r welcom