The sum of an arithmetic progression A. P. The sum of an arithmetic progression is
given by the expression:
Sn = n/2 [2a + (n − 1)d]
Where Sn is the sum.

S8 = 112

Step-by-step explanation:.

The question is incomplete

Assuming we are given the following

First term a =7

number of terms n = 8.

Common difference d=2

We can find the sum of the first 8terms S8

Substitute the given values

S8 = 8/2[2(7)+(8-1)(2)]

S8 =4(14+7(2))

S8=4(14+14)

S8 = 4(28)

S8 = 112

Hence the sum of the first 8terms is 112

Note that the values are assumed values

you can't solve x because it is 2 linear equation and you only have one equation

hello, there is a new name in town and that's the human spider!

answer: d.) the total number of protons and neutrons is 15

merry christmas!

~

your friendly neighborhood human spider! .