PLEASE HELP ME ! What is the sum of the finite arithmetic series −10, −8, −6, −4, ...24?
show work !!

Solution :

First term, a₀ = -10 .

Common difference of A.P. , d = -8 - (-10) = 2 .

Last term, aₙ = 24 .

We know, last term is given by :

aₙ = a₀ + (n-1)d

24 = -10 + (n-1)×2

2n - 2 = 34

n = 18

Now, sum of series is given by :

Hence, this is the required solution.

b

step-by-step explanation:

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