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Which term of an Ap 21,18,15..........…..............is …

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Which term of an Ap 21,18,15..........…..............is 0

    • Posted by Gaurav Pandey 6 years, 10 months ago

    CBSE > Class 10 > Mathematics
    • 2 answers

    Bhavya Vardhan Jain 6 years, 10 months ago

    21,18,15,............,n a=21 d=18-21 =-3 an=0 an=a+(n-1)d 0=21+(n-1)-3 -21=(n-1)-3 7=n-1 n=8 8th term of an Appointment is 0 .Ans

    0Thank You

    Garima Choudhary 6 years, 10 months ago

    An=0 apply the formula of an. a+(n-1)d =0. 21+(n-1) (--3) = 0. 21-3n +3 =0 . 24-3n =0 -3n =-24 . n= 8. So the 8th term of the ap will be 0.

    0Thank You

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