13) If 4th and 8th terms of an A.p. are Il and 23 respecti
-vely find a and d​

1 thought on “13) If 4th and 8th terms of an A.p. are Il and 23 respecti<br />-vely find a and d​”

1. Answer

   a4=a+(4-1)d=11

   a8=a+(8-1)d=23

   a+3d=11

   a+7d=23

   4d=12

   d=3

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