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I'm not able to make sense of this, can someone please explain the theory behind this?
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Htlol
I'm not able to make sense of this, can someone please explain the theory behind this?


Hi,
\(7^b + 7^b + 7^b + 7^b + 7^b + 7^b + 7^b = 7 * 7^b\)

now \(7 * 7 ^b =7^1*7^b=7^(b+1)\)as per the property of power..

Now it makes much more sense. Kudos!
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Bunuel
7^b + 7^b + 7^b + 7^b + 7^b + 7^b + 7^b =

A. 7^b
B. 7^(b + 1)
C. 7^(7b)
D. 8^b
E. 49^B

Simplifying the equation, we have:

7^b + 7^b + 7^b + 7^b + 7^b + 7^b + 7^b

7^b(1 + 1 + 1 + 1 + 1 + 1 + 1)

7^b(7) = 7^(b + 1)

Answer: B
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Given 7^b + 7^b + 7^b + 7^b + 7^b + 7^b + 7^b

Just added the above to give us = 7*7^b

and since bases are same, we can add the exponents

Giving answer as B => 7^(b+1)
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Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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