Let Ar be the area bounded by the curve y=xr (r≥1) and the line x=0, – InterviewSolution

1.	Let Ar be the area bounded by the curve y=xr (r≥1) and the line x=0,y=0 and x=12. If n∑r=12rArr=13, then the value of n is
Answer» Let $A_{r}$ be the area bounded by the curve $y = x^{r} (r \geq 1)$ and the line $x = 0, y = 0$ and $x = \frac{1}{2} .$ If $n \sum r = 1 \frac{2^{r} A_{r}}{r} = \frac{1}{3},$ then the value of $n$ is

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