Question

If the ratio of sum of first x terms of two ap is 3x+4 : 2x-7; find the ratio of their 15th term

Answer 1

★ ARITHMETIC PROGRESSION ★

Given :

Ratio of sum of first x terms of two AP :

3x + 4 : 2x - 7

Ratio of their 15th term will be aslike :

3 ( 2x - 1 ) + 4 : 2 ( 2x - 1 ) - 7

3 ( 30 - 1 ) + 4 : 2 ( 30 - 1 ) - 7

3 ( 29 ) + 4 : 2 ( 29 ) - 7

87 + 4 : 58 -7

91 : 51

Hence , the required ratio is 91:51

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