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Find S20 and t20 whose nth term of AP is tn=7-4n |
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Answer» Thanks sir ji Tn=7-4n..T1=7-4(1)...T1=3 means first terms is 3 and ..T2=7-4(2)...T2=--1 ....so common difference is -1-3=-4 ...Now find yourself what is S20 and T20 by formula Nhi ho rha S20 nhi aa rha put value of n |
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