The sum of the first five terms of the geometric series 8, -24, 72..... is 488 ⇒ answer B
Step-by-step explanation:
In the geometric series:
- There is a constant ratio " r " between each two consecutive terms
- The nth term is , where a is the 1st term
- The sum of nth terms is
∵ 8 , -24 , 72 , ........ is a geometric series
∵
∵ = 8
∵ = -24
∴
∴ r = -3
∵ The sum of the nth terms is
- We need the sum of the first 5 terms, then n is 5
∵ n = 5 , a = 8 , r = -3
- Substitute these values in the rule of the sum
∴
∴
∴
∴
∴
The sum of the first five terms of the geometric series 8, -24, 72..... is 488
Learn more:
You can learn more about sequence in brainly.com/question/1522572
#LearnwithBrainly
Answer: 28.05
Step-by-step explanation:
6/11 are girls since there is 11 kids total and only 6 girls.
Answer:
I don't know buh download socratic for the answer nd explanation
Answer:
-16x - 7b - 2800X + 35000
Step-by-step explanation: