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Recent questions tagged arithmetic-series
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GATE Mechanical 2020 Set 1 | GA Question: 8
The sum of the first $n$ terms in the sequence $8,\:88,\:888,\:8888,\dots$ is ________. $\dfrac{81}{80}\left ( 10^{n}-1 \right )+\dfrac{9}{8}n \\$ $\dfrac{81}{80}\left ( 10^{n}-1 \right )-\dfrac{9}{8}n \\$ $\dfrac{80}{81}\left ( 10^{n}-1 \right )+\dfrac{8}{9}n \\$ $\dfrac{80}{81}\left ( 10^{n}-1 \right )-\dfrac{8}{9}n$
The sum of the first $n$ terms in the sequence $8,\:88,\:888,\:8888,\dots$ is ________.$\dfrac{81}{80}\left ( 10^{n}-1 \right )+\dfrac{9}{8}n \\$$\dfrac{81}{80}\left ( 10...
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Feb 19, 2020
Quantitative Aptitude
gateme-2020-set1
numerical-ability
arithmetic-series
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