Answers

2015-06-10T18:52:10+05:30
Here a3 = 16 , we can also write it as a3 = a + 2d now it is given that a7 = a5 + 12 = a + 4d + 12 . Now just equate these both values and you will get the value of d and then put it in one of the equation and you will get the value of of a. Then you can easily get the required AP.
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