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Remind the AP whose third term is 16 and the 7th term exceeds the 5th term by 12 |
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Answer» Sum of n term balavi board Mein aaega We have given\xa0a3\xa0= 16a\xa0+ (3 − 1)\xa0d\xa0= 16a\xa0+ 2d\xa0= 16 (1)a7\xa0−\xa0a5\xa0= 12[a+ (7 − 1)\xa0d] − [a\xa0+ (5 − 1)\xa0d]= 12(a\xa0+ 6d) − (a\xa0+ 4d) = 122d\xa0= 12d\xa0= 6From equation (1), we obtaina\xa0+ 2 (6) = 16a\xa0+ 12 = 16a\xa0= 4Therefore, A.P. will be4, 10, 16, 22, … |
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