"Find the   sum of the following arithmetic progressions: `41 ,\ 36 ,\ 31 ,\ dot` to 12   terms
Channel: Doubtnut
Date: 2020-06-28

"Find the
 
  sum of the following arithmetic progressions:
 `41 ,\ 36 ,\ 31 ,\ dot`
 to 12
 
  terms 
 (ii) `a+b ,\ a-b ,\ a-3b ,\ `
 to 22 terms
 (iii) `(x-y)^2,\ (x^2+y^2),\ (x+y)^2,\ ddot,`
 to `n`
 terms"