1.

The sum of four number in A.P is 50 ,and the greatest number four times the least.Find the number.

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Thanks bhavya....
What Se (to Arun )
Let the first no. be \'a\'Therefore the terms of the AP area , a+d ,a+2d ,a+3d.So,a+(a+d)+(a+2d)+(a+3d)=504a+6d=502a + 3d = 25.......inow we know that the 4th term is 4times the first term.Therefore, 4a = a+3d3a = 3d a = d......ii Substituting ii in i we get2a+3a=25 a = 5Thus the AP is5 , 10 , 15 , 20 ....
Se


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