Math, asked by suhanisharma, 1 year ago

Find four numbers in A.P,whose sum is 20,sum of squares is 120?

Answers

Answered by Raji777

The 4 numbers which are in AP are 2,4,6,8.

Answered by Anonymous

Sum of n terms n/2(2a+(n-1)d)
20=4/2(2a+3d)...........1
sum of quares of n terms pic attached
by puting values and solinv 1 n 2 eqns
u get a=2:d=2
2,4,6,8
4+16+36+64=120

suhanisharma: 'sum of quares of n terms pic attached' where is it ?

Anonymous: sorry attachment i have missed

Anonymous: squares*

Anonymous: i'll send u link plz get tht there

Anonymous: http://pballew.blogspot.in/2012/12/my-formula-for-series-of-squares-of.html

Anonymous: plz mark it as brainlest..hope it hlped u

Previous Question

Next Question