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December 20, 2014

December 20, 2014

Posted by **Dakota** on Thursday, October 15, 2009 at 2:25pm.

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7 to the power of - 4

could you show me how you get 49 as the naswer...the long line shows that you need to divide both of them

- Math -
**MathMate**, Thursday, October 15, 2009 at 3:31pmIf you see a negative exponent in the numerator, it is the reciprocal of the number without the negative sign in the exponent. Namely:

A^{-b}= 1/A^{b}

or

1/A^{-b}= A^{b}

Therefore

7^{-2}/ 7^{-4}

=7^{4}/ 7^{2}

=?

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