-1, -3/2, -2, 5/2 .... from an AP as a2-a1=a3-a2

1.	-1, -3/2, -2, 5/2 .... from an AP as a2-a1=a3-a2
Answer» -3/2 + 1 = -2 + 3/2.(-3 + 2)/2 = (-4 + 3)/2.-1/2 = -1/2. Hence, the above sequence is an A.P.

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