If the sums of the first n terms of two ...

If the sums of the first n terms of two A.P.'s are in the ratio `7n-5: 5n+ 17,` show that the 6th terms of the two series are equal.

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ICSE-SEQUENCE AND SERIES -EXERCISE 14 (c)

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If the ratio of the sum of m terms and n terms of an A.P. be m^2 : n^2...
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Let a(1) , a(2) , a(3) , ..... be terms of an A.P. If (a(1)+a(2)+........
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The ratio between the sum of n terms of two A.P.'s is (7n + 1) : (4n+2...
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