The sum of n terms of an AP is (5n2 – 3n). Find the AP and hence find its 10th term.​

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1. Answer:

   AP is 2,14,26, 38..

   A10 = 470

   Step-by-step explanation:

   An= 5n² – 3n

   A1= 5-3 = 2

   A2= 5×(2)² – (3×2)= 14

   d= A2-A1= 14-2 = 12

   so, AP is 2,14,26,38 and so on.

   And 10th term of this AP is,

   A10 = 5×(10)² – (3×10) = 500 – 30 = 470

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