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The 15th term of an arithmetic sequence is 74, and the common difference is 5. Find a formual for the nth term
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The 15th term of an arithmetic sequence is 74, and the common difference is 5. Find a formual for the nth term
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Question 326180: Please help me with this problem:
The 15th term of an arithmetic sequence is 74, and the common difference is 5. Find a formual for the nth term Answer by stanbon(75887) (Show Source):
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The 15th term of an arithmetic sequence is 74, and the common difference is 5. Find a formual for the nth term
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Using a(n) = a(1)+(n-1)d you get:
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74 = a(1)+(14)*5
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74 = a(1) + 70
4 = a(1)
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Therefore: a(n) = 4 + (n-1)5
a(n) = 5n-1
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Cheers,
Stan H.
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