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5 votes
Help me pleaseeeeeee

Help me pleaseeeeeee-example-1
User Dtheodor
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2 Answers

4 votes

Answer: I think it 4 or 1

Explanation:

User Simulate
by
8.4k points
1 vote

Answer:

(1) i and ii

Explanation:

You want the formulas that describe a sequence that starts at $30,000 and increases by $800 each year.

Arithmetic sequence

The initial value of the sequence is 30,000. This is the value for n=0. This rules out choice iii, which has an initial value of -30,000.

When n=1, the value is 30800. This matches the behavior of the formulas in choices i and ii.

(1) i and ii

__

Additional comment

The explicit formula for an arithmetic sequence with an initial value of a0 and a common difference of d is ...

an = a0 +nd

The recursive formula for the same sequence is ...

f(n) = f(n-1) +d where f(0) = a0

Here, we are numbering the terms starting with n=0. The salary is increased by 800 to 30,800 after one year, when n=1. Quite often it is the case that the first term of the sequence corresponds to n=1.

User Tyrik
by
8.2k points

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