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17. Find the middle term of the AP 6, 13, 20,..., 216. |
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Answer» A=6 d=7 Tn= a+ (n-1)d 216=6+(n-1)*7 n=31 total no. of terms=31 middle term=(31+1)/2 =16th T16= a+(16-1)d = 6+(15*7) =111 therefore the middle term of the AP is 111 216=6+(n-1)×7=31 how bro i can't understand |
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