Maths 1.. please try to solve with step to step method
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I think option D is the correct answer
Step-by-step explanation:
because d = a2 - a1
4 - 1 = 3
d2 = a3 - a2
d2 = 9 - 4
d2 = 5
so, c.d.is not same therefore this is not an AP
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