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22 votes
Explain how to find the 41st term of the arithmetic sequence where a1=5 and a7=34.​

User STLMikey
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1 Answer

20 votes
20 votes

Answer:

198 1/3

Explanation:

arithmetic sequence formula for the nth term:

aₙ = a₁ + (n-1)d

d = the common difference between each term

a₇ = a₁ + (7-1)d

34 = 5 + 6d

subtract 5 from both sides to isolate d and its coefficient

29 = 6d

divide both sides by 6 to isolate d

d = 29/6

a₄₁ = a₁ + (n-1)d

= 5 + (41-1)d

= 5 + 40d

= 5 + 40(29/6)

= 198 1/3

User Simeon Ikudabo
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