Question

2.4 + 4.7 + 6.10 + ........up to (n – 1) terms =​

Answer 1

Answer:

${\blue{\underline{\underline{\bold{\huge{Solution:-}}}}}}$

Here, general term for this series ____⋆⋆

= 2n ( 3n +1) +6n^2 +2n

✰ ✰The sum of series to n term ____⋆⋆

={ 2(n+1) ( 2n+1)} /6 +2 * n(n+1) /2

= n ( n+1) { (2n+1) +1}

= 2n ( n+1)^2

Now, we have to substitute (n-1) in place of n.

Therefore,

☞ sum of the series is ____

2 (n-1) n^2 = 2n^3 -2n^2

${\huge{\mathcal{\pink{Hope \ It's \ Helpful.!!!}}}}$

Answer 2

Answer:

Hello vhai

2.4 + 4.7 + 6.10 + ........up to (n – 1) terms =

It's ur answer

Mark as brainlist