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Find S10 and explain why it is impossible to find so for the series
2, 6, 18, ...

Find the number of terms in the series + 8 -12 +18 -
-307.546875

ANSWER BOTH WITH WORK SHOWN. USE FORMULAS

sn = n/2(t1 + (n-1)d)
OR
sn t1(1-r^n)/ 1-r

Respuesta :

Answer:

1. nth term is 8 but it may continue to decrease depending on the 4th number. Therefore it is impossible to find the nth expression.

2, 2(n+9)

Step-by-step explanation:

2, 18 -20+38 -40.5+75.5 -81.12535+151.2517 -151.535 +303.754 -307.54...

nth term is n/2(t1-1)

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