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katiebugg

  • 3 years ago

find the the first term in the arithmetic series Sn = 781, d = 3, n = 22

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  1. A.Avinash_Goutham
    • 3 years ago
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    find an

  2. A.Avinash_Goutham
    • 3 years ago
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    an = sn - sn-1

  3. katiebugg
    • 3 years ago
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    ?? more help pluz

  4. KNicksfan4life
    • 3 years ago
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    (a1+ a1+ 21·3)·22/2= 781 --> (2a1+63)= 71 --> 2a1=8 --> a1=4

  5. katiebugg
    • 3 years ago
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    thanks!!!!!!!!

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