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- If 9 times the 9th term of an A.P. is equal to 13 times the 13^(th) te...
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- The third of G.P. is 4. The product of its first 5 terms is :
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- If the sum of n terms of an A.P. is given by : S(n) = 3n+ 2n^(2), th...
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- If t(n) denotes the nth term of the series : 2+3+6+11+18+"………." , th...
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