Plz....solve quickly......board is up...

Asked by  | 12th Mar, 2009, 07:48: PM

Expert Answer:

Let a-d,a  and a+d be three terms of an AP

ATQ

a-d +a + a+d = 15  So a =5

(a-d )2+a+ (a+d)2 = 93

3a2+2d2= 93

d =  3

Answered by  | 12th Mar, 2009, 10:25: PM

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