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figs: Senior | Next Rank: 100 Posts; Posts: 70; Joined: Mon Mar 30, 2009 9:00 am; Thanked: 2 times

by figs » Tue Apr 07, 2009 9:49 am

can anybody explain me the exponents rules??

OA C

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Source: Beat The GMAT — Problem Solving | Tue Apr 07, 2009 9:49 am

moutar: Senior | Next Rank: 100 Posts; Posts: 92; Joined: Wed Mar 25, 2009 12:13 pm; Thanked: 10 times

by moutar » Tue Apr 07, 2009 10:00 am

Do you mean:

a^m x a^n = a^(m+n)
a^m / a^n = a^(m-n)
(a^m)^n = a^(m*n)

Why is there an official answer?

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