If the sum of first' p 'terms of an AP is ap x p+bp,find it's common difference
Asked by | 18th 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
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 | 18th Nov, 2012, 09:44: AM
Kindly Sign up for a personalised experience
- Ask Study Doubts
- Sample Papers
- Past Year Papers
- Textbook Solutions
Sign Up
Verify mobile number
Enter the OTP sent to your number
Change