Question

if. an 2n2-1 find valu of 4the term​

Answer 1

Answer:

it's depend on the digits but you have to do answer with the help of this answer

Step-by-step explanation:

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Answer 2

Answer:

Sure friend

This equation shows the sum of terms..

2n^2 - 1

2×1^2-1

2-1

2

So, first term is 2

Next,

2n^2-1

2×2^2-1

2×4-1

8-1

7

So, the sum of first two terms = 7

Therefore, 2nd term = 7- 1st term

= 7-2

= 5

Common difference = 2nd term - 1st term

= 5-2

= 3

4th term = a+3d

= 2+3×3

= 2+9

= 11 is the Answer...