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34 ++10213*1210(1) 7+7+10- +14+....+84(ii) -5 + (-8)+(-11)+...+(-230)In an AP:(1)given a =5, d=3,0 = 50, find n and Snigiven a =7,0,3 = 35, find d and Sgiven a = 37, d=3, find a and S(iv)given a, = 15, S = 125, find d and a(v)given a = 2, d=8, S = 90, find n and a(vi)given a = 4, d=2, S =-14, find n and a.(vii)given l=28, S = 144, and there are total 9 terms, find a.The first and the last terms of an AP are 17 and 350 respectively. If the common differenis 9, how many terms are there and what is their sum?Find the sum of first 51 terms of an AP whose second and third terms are 14 andespectivelynnn |
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