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here is the que

here is the que

Question Image
Grade:12th Pass

1 Answers

Harsh Patodia IIT Roorkee
askIITians Faculty 907 Points
6 years ago
Using (a2– b2= (a+b)(a-b)
20162- 20132= 3( 4029)
20152 –20122= 3(4027)

Similarly u can proceed and take out 3 common from all the pairs.
So it will be divisble by 3. The other term in the bracket will be AP. You can solve and proceed.

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