CBSE Class 10 Answered
If the sum of first' p 'terms of an AP is ap x p+bp,find it's common difference
Asked by | 18 Nov, 2012, 09:32: AM
Expert Answer
Let p = 1
S1 = a( 1)2 + b* 1 = a + b = a1
S2 = a ( 2 )2 + b*2 =4a + 2b
Therefore a2 = 4a + 2b -a - b = 3a + b
Therefore common difference = a2 - a1 = 3a + b - a -b = 2a
Answered by | 18 Nov, 2012, 09:44: AM
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