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2.Consider an A.p. a, ay, az ....... such that as+as+ag=11 and a ta = -2, then the value of a +ar+a, is1)-82) 53) 74) 9 |
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Answer» let first term be aand common difference be da/c to que, a+2d+a+4d+a+7d=113a+13d=11anda+3d+a+d=-22a+4d=-2a+2d=-1so, a1+a6+a7=3a+11dputting the value of a=-5&d=2is 7 |
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