Question

найдите первообразной функции ? a) f(x)=2x+x²
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Answer 1

$\displaystyle\bf\\f(x)=2x+x^{2} \\\\\\F(x)=2\cdot\dfrac{x^{2} }{2} +\dfrac{x^{3} }{3}+C\\\\\\F(x)=x^{2} +\dfrac{x^{3} }{3} +C$