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If the 3rd and the 9th …

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If the 3rd and the 9th term of an ap are 4 and -8 respectively, which of which term of this is zero

    • Posted by Tanmay Meshram 4 years, 9 months ago

    CBSE > Class 10 > Mathematics
    • 2 answers

    Aanya Jain 4 years, 9 months ago

    a+2d=4. (1) a+8d=-8. (2) Subtract eq 1 and 2 a+2d=4 a+8d=-8 (-)(-). (+) --------------- -6d=12 d= -2 Replace in eq 1 a + 2(-2)=4 a-4=4 a=4+4 a=8 an=a+(n-1)d 0= 8+(n-1)-2 0-8 =(n-1)-2 -8/-2 =n-1 4=n-1 4+1 =n 5=n ---------

    0Thank You

    ಹರ್ಷನಂದ ಹರ್ಷನಂದ 4 years, 9 months ago

    ನಂಗ್ ಗೊತ್ತಿಲ್ಲ??????

    0Thank You

    ANSWER
    http://mycbseguide.com/examin8/

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