Answer:
x = - 33
Step-by-step explanation:
Given
(x + 6) = - 18
Multiply both sides by 3 to clear the fraction
2(x + 6) = - 54 ( divide both sides by 2 )
x + 6 = - 27 ( subtract 6 from both sides )
x = - 33
They take out each other
Answer = 0
If
is the common difference between terms in the sequence
, then
...
You're told that
(the sum of the first 16 terms in the sequence, presumably). Well, we know that
Recall that
so that we have
So we get