Question

Which of the following is the correct expanded form for the series below?
4€ n=1 n/n!

Answer 1

Answer:the first option

Explanation:

it just is

Answer 2

1st option

Explanation:

We are summing the expression for n = 1 to n = 4 , that is

`(1)/(1!)` +
`(2)/(2!)` +
`(3)/(3!)` +
`(4)/(4!)`

1 ! = 1, 2! = 2 × 1 = 2 , 3! = 3 × 2 × 1 = 6 , 4! = 4 × 3 × 2 × 1 = 24 , then

`(1)/(1)` +
`(2)/(2)` +
`(3)/(6)` +
`(4)/(24)`

= 1 + 1 +
`(1)/(2)` +
`(1)/(6)`