![36 = \frac{x(x + 1)}{2} 36 = \frac{x(x + 1)}{2}](https://tex.z-dn.net/?f=36+%3D++%5Cfrac%7Bx%28x+%2B+1%29%7D%7B2%7D+)
find n?
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Answer:
oh simple search in net or ask ur maths teacher again to clarify your doubt
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