Answer:
20,176,803
Step-by-step explanation:
This geometric series has a first term of 3 and a common ratio of 21/3 = 7. The formula for the sum of n terms of a series with first term a1 and common ratio r is ...
Sn = a1·(r^n -1)/(r -1)
For a1=3, n=9, and r=7, the sum is ...
S9 = 3·(7^9 -1)/(7 -1) = 3·40353606/6 = 20,176,803
The sum of the first 9 terms is 20,176,803.
_____
The first 9 terms are ...
3 +21 +147 +1029 +7203 +
50,421 +352,947 +2,470,629 +17,294,403
- First, we find the <u>lowest common denominator</u> which is "14", we put it in the common numerator.
<h3><em><u>MissSpanish</u></em></h3>
Answer:
2, -3
Step-by-step explanation:
4 units down is -9, then a reflection over y axis makes -2 2 6 units up makes -9 -3
Answer:
A
Step-by-step explanation:
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