A.P

Asked by nishac | 15th Jun, 2009, 02:47: PM

Expert Answer:

let the four numbers in A.P. be a-3d, a-d,a+d, a+3d  (imp. step)

acc to question,

their sum =50

 so we get,

4a=50

a=25/2

it's given that the greatest number is 4 times the least.

so,

a+3d=4(a-3d)

15d=3a

5d=a

d=a/5

d=5/2

using this info that

a=25/2 and d=5/2

 you can find the numbers.

Ans-   5,10,15,20

 

Answered by  | 15th Jun, 2009, 07:56: PM

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