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mel-nik [20]
3 years ago
5

6. Find the first, fourth, and tenth terms of the arithmetic sequence described by the given rule.

Mathematics
1 answer:
Svetach [21]3 years ago
7 0

Answer:

A_1 = 12

A_4=21

A_{10}= 39

Step-by-step explanation:

A_n = 12+(n-1)(3) \\  \\ plug \: n = 1 \\ A_1 = 12+(1-1)(3)  \\ = 12 + 0(3)  \\ = 12 + 0  \\ \red{ A_1= 12} \\  \\  plug \: n = 4\\ A_4 = 12+(4-1)(3)  \\ = 12 + 3(3)  \\ = 12 + 9  \\ \purple{ A_4= 21} \\  \\ plug \: n = 10\\ A_{10} = 12+(10-1)(3)  \\ = 12 + 9(3)  \\ = 12 + 27  \\ \orange{ A_{10}= 39} \\  \\

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Hey There Luci,

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