How to simplify factions
1 answer:
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Answer:
a. 435.4
Step-by-step explanation:
We are given a geometric sequence with first term, firth term and the common ratio. We are asked to find the sum of first 5 terms of the geometric series.
The formula to calculate the sum of finite geometric series is:
Since we need to find the sum of first 5 terms, n will be 5. Using these values in the above formula, we get:
Therefore, the sum of first 5 terms of the given geometric series would be 435.4
Answer:
= 10.5 - 3n
Step-by-step explanation:
The explicit rule for an arithmetic sequence is
= a₁ + (n - 1)d
where a₁ is the first term and d the common difference
A recursive formula has the form
=
+ d ( where d is the common difference )
Given
=
- 3 ⇒ d = - 3
Thus explicit rule with a₁ = 7.5 and d = - 3
= 7.5 - 3(n - 1) = 7.5 - 3n + 3 = 10.5 - 3n