A geometric sequence is shown on the graph below. What is the formula for the nth term of the sequence?
1 answer:
Answer:
aₙ = 40*(1/2)ⁿ⁻¹
Step-by-step explanation:
<u>As per graph we have:</u>
- a₁ = 40, a₂ = 20, a₃ = 10, a₄ = 5, a₅ = 2.5
<u>So the first term is </u><u>40</u><u> and common ratio is </u>
- 20/40= 10/20 = 5/10 = 2.5/5 = 1/2
<u>Formula for nth term is:</u>
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