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Mathematics

1 answer:

Rasek [7]4 years ago

4 0

Answer: (B) 18 - 3.5n

<u>Step-by-step explanation:</u>

Given the sequence {14.5, 11, 7.5, 4, 0.5} we can see that the first term (a₁) is 14.5 and the difference (d) is -3.5

$\text{The general formula for the explicit rule of an arithmetic sequence is:}\\a_n=a_1+d(n-1)\\\text{So,}\ a_n=14.5-3.5(n-1)\\.\qquad =14.5-3.5n+3.5\\.\qquad =18-3.5n$

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