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I have to calculate the integral $$\int_{K}xy \cdot dx $$ along the curve K with equation $y=x^2$ at which $x$ varies from $1$ to $2$. I don't know how to begin answering this question.

Matti P.
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Wouter Lommerse
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    Have you calculated line integrals before? It's useful to read to Wikipedia page ...https://en.wikipedia.org/wiki/Line_integral – Matti P. Jun 05 '19 at 11:41
  • @MattiP. I did, but can't really understand the question. I know how to calculate these kind of questions when there are parametric equations, but not when its formulated like this. – Wouter Lommerse Jun 05 '19 at 12:13
  • Parametrize the curve with (for instance) $x=t$, $y=t^2$ and $dx=dt$ where $1\leq t\leq2$. – Nosrati Jun 05 '19 at 12:49

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