How many teram af AP :24, 21,18,....... Must be taken so that their sum is 78 ?

 Here,    a=24 , d=12-24=-3, Sn= 78.

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MY Name mukesh sahu

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jharkhand acdemic concial

Hy friends ap svi ko jharkhand acdemic concial ne 2020-21 ka exam date fast March ko exam date jari kiya gya. 

Lockdone ke karn svi ka  study bf ho gya.