Question

Find three positive integers of ap whose sum is 30

Answer 1

$a - d + a + a + d = 30 \\ a = 10$

Answer 2

a+a+d+a+2d=30

3a +3d =30

a+d=10

a = 10 - d by trail and error

a= 6 & d = 4

the A.P is 6, 6+4, 6+2(4)

6,10,14

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