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When [k^(n-1)]/[k-1]=k^(n-1)+k^(n-2)+.....+k+1, 7^8+7^7+.....+1= 6,725,601, what is the value of 7^9?
A. 6*6,725,601 + 1 B. 6*6,725,601 -1 C. 5*6,725,601 +1 D. 5*6,725,601 -1 E. 7*6,725,601+1
Hello all!
There is this sequence problem I can't figure out a solution to.
Can someone share any easy way to solve it?
Thanks! :please
A. 6*6,725,601 + 1 B. 6*6,725,601 -1 C. 5*6,725,601 +1 D. 5*6,725,601 -1 E. 7*6,725,601+1
Hello all!
There is this sequence problem I can't figure out a solution to.
Can someone share any easy way to solve it?
Thanks! :please
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![When [k^n-1]/[k-1]=k^n-1+k^n-2+.....+k+1,](https://cdn.gmatclub.com/cdn/files/forum/styles/gmatclub_light/imageset/icon_post_target_unread.svg "When [k^n-1]/[k-1]=k^n-1+k^n-2+.....+k+1,"){kind=icon}
19 Nov 2019, 20:23
Kudos
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ec9rs
When [k^n-1]/[k-1]=k^n-1+k^n-2+.....+k+1, 7^8+7^7+.....+1= 6,725,601, what is the value of 7^9?
A. 6*6,725,601 + 1 B. 6*6,725,601 -1 C. 5*6,725,601 +1 D. 5*6,725,601 -1 E. 7*6,725,601+1
Hello all!
There is this sequence problem I can't figure out a solution to.
Can someone share any easy way to solve it?
Thanks!
A. 6*6,725,601 + 1 B. 6*6,725,601 -1 C. 5*6,725,601 +1 D. 5*6,725,601 -1 E. 7*6,725,601+1
Hello all!
There is this sequence problem I can't figure out a solution to.
Can someone share any easy way to solve it?
Thanks!
The question has asked o be posted clearly and formatted too.
It is not clear whether \(k^{n-1}/(k-1)\) or \(k^n-1/(k-1)\)
19 Nov 2019, 20:50
Kudos
Bookmarks
chetan2u
ec9rs
When [k^n-1]/[k-1]=k^n-1+k^n-2+.....+k+1, 7^8+7^7+.....+1= 6,725,601, what is the value of 7^9?
A. 6*6,725,601 + 1 B. 6*6,725,601 -1 C. 5*6,725,601 +1 D. 5*6,725,601 -1 E. 7*6,725,601+1
Hello all!
There is this sequence problem I can't figure out a solution to.
Can someone share any easy way to solve it?
Thanks!
A. 6*6,725,601 + 1 B. 6*6,725,601 -1 C. 5*6,725,601 +1 D. 5*6,725,601 -1 E. 7*6,725,601+1
Hello all!
There is this sequence problem I can't figure out a solution to.
Can someone share any easy way to solve it?
Thanks!
The question has asked o be posted clearly and formatted too.
It is not clear whether \(k^{n-1}/(k-1)\) or \(k^n-1/(k-1)\)
Hi! Sorry for the confusion!
I edited the original post and it is supposed to be \(k^{n-1}/(k-1)\) .
Thanks!
