How do you complete the sentence: 68 is the __th term of the arithmetic sequence -2, 3, 8,...?

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Answer 1 · 2016-10-11T03:11:52

We use the formula #t_n = a + (n - 1)d# to find the nth term of an arithmetic sequence.

#68 = -2 + (n - 1)5#

#68 = -2 + 5n - 5#

#68 = -7 + 5n#

#75 = 5n#

#n = 15#

Hopefully this helps!