5^12 + 5^13=? 5^25 10^25 6(5^12) 10^12+5 2(5^12)+5 : PS Archive
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# 5^12 + 5^13=? 5^25 10^25 6(5^12) 10^12+5 2(5^12)+5

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5^12 + 5^13=? 5^25 10^25 6(5^12) 10^12+5 2(5^12)+5 [#permalink]

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12 Sep 2006, 11:26
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5^12 + 5^13=?

5^25
10^25
6(5^12)
10^12+5
2(5^12)+5
Senior Manager
Joined: 20 Feb 2006
Posts: 373
Followers: 1

Kudos [?]: 25 [0], given: 0

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12 Sep 2006, 16:59
5^12 + 5^13=?

5^12 + 5^13 = 5^12 + 5^(12+1)

Taking 5^12 as common factor:

(5^12)(1+5) = 6(5^12)
12 Sep 2006, 16:59
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