Use the formula to evaluate the series 3-9+27-81+...-ae
1 answer:
Answer:
( -4920)
Step-by-step explanation:
we see that the first term is 3 and the common ratio between the succeeding terms is -3. so to solve for the sum of the first 8 terms
Sum = (a1)(1 – r^n) / (1 – r)
and substituting the known terms,we got
Sum = (3)(1 – (-3)^8)/(1 - (-3)) = -4920
Then the answer = ( -4920)
You might be interested in
Answer:
-1/2
Step-by-step explanation:
y = mx + c is the standard form of the equation where m is slope. Comparing the question to the equation we get
m = -1/2
Can you clarify or add a picture?
Answer:
Step-by-step explanation:
Take the pre-sale price.
Divide the original price by 100 and multiply it by 30.
Take this new number away from the original one.
The new number is your discounted value.
Answer:
x > 23 I think
Step-by-step explanation:
Answer:
2800000
Step-by-step explanation:
10^6 means 1000000
2.8 x 1000000 = 2800000