Evaluate: `int_1^3(2x^2+5x)dx\ "a s\ l i m i t\ o f\ a\ sum"dot`

Explanation

Let `f(x)=2 x^{2}+5 x`


Here `a=1, b=3`



Therefore, `{h}=\frac{{b}-{a}}{{n}}=\frac{3-1}{{n}}=\frac{2}{{n}} \Rightarrow {nh}=2`



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