Question

what is 1! +2!+3!+4!+.......2019!​

Answer 1

Answer:

it should be 10

Step-by-step explanation:

1+2+3+4is10

Answer 2

Answer:

Answer:-2039190

Step-by-step explanation:

Given:-

1! + 2! + 3! + 4! + ........... 2019!

Take common 1! all the given values

then,

1! [ 1 + 2 + 3 + 4.............. 2019 ]

we know 1! value is 1. and sum of

natural numbers from 1 to n

formula is [ n ( n + 1 ) ]/2

So,

1 [ 2019 ( 2019 + 1 ) ]/2

2019 × 2020/2

2019 × 1010

2039190.