SOLUTION: Use the formula for the general term (the nth term) of an arithmetic sequence to find the indicated term of the sequence with the given first term, a1, and common difference, d.( a

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Question 1181058: Use the formula for the general term (the nth term) of an arithmetic sequence to find the indicated term of the sequence with the given first term, a1, and common difference, d.( an = a1 + ( n - 1) d )
Find a19 when a1 = 9, d = -5.
a. 99
b. 104
c. -86
d. -81

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

a%5Bn%5D+=+a%5B1%5D+%2B+%28+n+-+1%29+d+
Find a%5B19%5D when a%5B1%5D+=+9, d+=-5
a%5B19%5D+=+9+%2B+%28+19+-+1%29+%28-5%29+
a%5B19%5D+=+9+%2B+18+%28-5%29+
a%5B19%5D+=+-81

answer: d. +-81