Question

PLEASE HELP WITH THIS QUESTION!! DUE BY 1PM! wILL RATE YOU GOOD!! THANK YOU!!

What is ∑n=111(98−2n) equal to?

Answer 1

946

Explanation:

Answer 2

Find
`a_(1)` by plugging in 1 into n:

`a_(1) = 98-2(1)=96`

Find
`a_{11` by plugging in 11 into n:

`a_(11) = 98-2(11)`

`a_(1) =98-22=76`

Now to find the sum your formula is:

`S_(n) = (n)/(2) ( a_(1) + a_(n))`

`n = 11,   a_(1) = 96 ,  a_(11) =76`

Now plug that into the formula

`S_(11) = (11)/(2) (96+76)`

`S_(11) = 5.5(172)=946`

Hope that helps