luella614ox1zum
13.12.2020 •
Mathematics
the first term of an arthimetic sequence is 42 the rule an= an-1 +8 can 1 can be used explain how to write explict rules
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Ответ:
34 + 8n
Step-by-step explanation:
a₁ = 42
a₂ = a₁ + 8 = 42 + 8 = 50
a₃ = a₂ + 8 = 50 + 8 = 58
a₄ = a₃ + 8 = 58 + 8 = 66
Arithmetic sequence: 42, 50 , 58 , 66, ......
a₁ = 42 ; d = 8
= a₁ + d(n-1)
= 42 + 8(n - 1)
= 42 + 8n - 8
= 34 + 8n
Ответ:
= 8n + 34
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
Given the recursive rule
= + 8
where + 8 is the common difference d , then
= 42 + 8(n - 1) = 42 + 8n - 8 = 8n + 34
Explicit rule is
= 8n + 34
Ответ:
Because one letter represents an endpoint and the other doesn't.
Step-by-step explanation:
Ray AB starts at endpoint A and goes through point B and then on, indefinitely.
Ray BA starts at endpoint B and goes through point A and then on, indefinitely.
They 'point' in opposite directions.