I need help with 2 c++ codes

Question

1. A prog for a math expression i will share below
2. An algo which reads 20 real numbers and shows their sum and multiplication

Answer 1

do so

Answer 2

and where is your attempt???

Answer 3

"I will share below“ where did you share it I cant see

Answer 4

you will need input and output:

https://www.sololearn.com/learn/CPlusPlus/1603/

you will need variables and basic arithmetic:

https://www.sololearn.com/learn/CPlusPlus/1606/

and you will need loops:

https://www.sololearn.com/learn/CPlusPlus/1616/

Answer 5

i will try like this
sum from i=1 till n of
(i+3)/(i^2+5)
we need to enter n positiv int and let the prog caculat it

Answer 6

i am not getting the logic of it tbh

Answer 7

i cant share a pic i am trying too lol
it is a sum equation i can type it

Answer 8

i cant find the logic of it
no clear arrempt

Answer 9

and i am using my phone now but i code on my pc