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Wierd virGo
Wierd virGo asked in Education & ReferenceHomework Help · 1 decade ago

Can some one help me with this Math Problem?

This is not an attempt for some one to do my homework!!!

I already have the answer..I just dont have the slightest idea on how they got it..

here it goes

3^-2 + 3^-1 = 4/9

Three to the negative two power plus three to the negative one power equals four over nine....

what the heck??

2 Answers

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  • surlyviking
    1 decade ago
    Favorite Answer

    Any number to a negative power is equal to the inverse of that number to the positive power. So 3^-1 = (1/3)^1 = 1/3, 3^-2 = (1/3)^2 = (1/3)*(1/3) = 1/9.

    1/3+1/9 = 3/9 + 1/9 = 4/9

  • Jason M
    1 decade ago

    3^-2=1/3^2=1/9

    3^-1=1/3

    1/9+1/3=4/9

    Source(s): My math knowledge
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