Answer:
12 - 2n
Step-by-step explanation:
The n th term of an arithmetic sequence is
= a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Here a₁ = 10 and d = 8 - 10 = - 2, thus
= 10 - 2(n - 1) = 10 - 2n + 2 = 12 - 2n
Find the sum of a third (a+b) and a fifth of (a-b)
1 answer:
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