Question

$intlimits^a_b {x} , dx$x²dx

Answer 1

$intlimits^a_b {x} , dx =frac{x^2}{2}|^a_b=frac{a^2-b^2}{2}$
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$intlimits^a_b {x^2} ,dx=frac{x^3}{3} |^a_b=frac{a^3-b^3}{3}$