Question

\[\lim_{x \rightarrow 1}\frac{ 2x+3x^2........+(n+1)x^n - \frac{ n(n+3) }{ 2 } }{ x-1 }\]

Answer 1

what is that written ?
n(n+3)/2 ?

Answer 2

please confirm ?

Answer 3

Yes

Answer 4

did you try LH rule?

Answer 5

seems legitimate to me..

Answer 6

there?

Answer 7

Yup..I Tried...

Answer 8

n is Constant Ryt ?

Answer 9

Yes n is constant

Answer 10

did u get the answer ?

Answer 11

Nope