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Math Help - geometric series

  1. #1
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    geometric series

    find the nth term of the geometric sequence whose initial term is 7.5 and common ration is 10.

    i need some help with this one
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  2. #2
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    Do you know what that means?
    Do you know what the second term would be? The third?
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  3. #3
    A riddle wrapped in an enigma
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    Quote Originally Posted by dat1611 View Post
    find the nth term of the geometric sequence whose initial term is 7.5 and common ration is 10.

    i need some help with this one

    Hi dat1611,

    Are you looking for this?

    a_n=a_1r^{n-1}
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  4. #4
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    ya thats what i needed
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