Evaluate n+2x^2 when n=3 and x=-2
1 answer:
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Answer:
= 18n + 26
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 = 44 and d = 62 - 44 = 18 , thus
= 44 + 18(n - 1) = 44 + 18n - 18 = 18n + 26