Multiple Choice Questions on If 7 times the seventh term of an Arithmetic Progression AP is equal to 11 times its eleventh term t........... for SSC CGL Exam Preparation

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Multiple Choice Questions

If 7 times the seventh term of an Arithmetic Progression AP is equal to 11 times its eleventh term t...........

Quantitative Aptitude (CGL) Arithmetic progression
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    If 7 times the seventh term of an Arithmetic Progression (AP) is equal to 11 times its eleventh term, then the 18th term of the AP will be

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    2

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    -1

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    Explanation:

    Let the first term of AP is a and uniform difference is d.
    7*(a + 6d) = 11*(a + 10d);
    11a – 7a +110d – 42d =0; => 4a + 68d=0; => a =-17d;
    The 18th term of AP = a + 17d = -17d + 17d =0

    By: MIRZA SADDAM HUSSAIN
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