Q4 of 102 Page 429

Find three arithmetic means between 6 and - 6.

let the three AM be x1,x2,x3.

So new AP will be


6,x1,x2,x3, - 6


Also - 6 = 6 + 4d


d = - 3


x1 = 3


x2 = 0


x3 = - 3


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