Question

check weather 5n^2 - 1 belongs to the AP or not​

Answer 1

Answer:

Step-by-step explanation:

I) TAKE THE VALUE OF N = 1

     5(1)^2 - 1 =  5 - 1 = 4

II) TAKE THE VALUE OF N =2

    5(2)^2 - 1 = 20 - 1 = 19

III) TAKE THE VALUE OF N = 3

     5(3)^2 - 1 = 45 - 1 = 44

D = 19 - 4 = 44 -19

   = 15 ≠ 26

SO IN BOTH CASES D IS NOT EQUAL

HENCE THIS NOT AP

HOPE ITS HELP YOU PLEASE MAKE ME BRAINLIEST

Answer 2

Answer:

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Step-by-step explanation:

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