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Which term of the AP:121, 117,113,...,is …

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Which term of the AP:121, 117,113,...,is it's first negative term? [Hint:find n for a/n<0]

    • Posted by _Jass_ Mahey_ 2 months, 1 week ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Ankit Class 12 2 months, 1 week ago

    a=121 , d= -4 let l=o . a+ (n-1)d = l . 121+(n-1)x-4= 0. (n-1)=121/4. n= 30.25+1. n = 31.25 , Here we know that n always be natural number hence n should be 31. n= 31.

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