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JEE Main Mathematics question

MathematicsSequence and SeriesJEE Main

If for all , then is

Answer: (A)

Solution

. $Missing argument for \frac\frac1{}=Missing argument for \frac\frac2{r(r+1)}=2(Missing argument for \frac\frac1r-Missing argument for \frac\frac1{r

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Question ID VK-021869