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OpenStudy (wade123):
Find an equation for the nth term of the arithmetic sequence. a16 = 21, a17 = -1
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OpenStudy (wade123):
an = 351 - 22(n + 1)
OpenStudy (wade123):
@ganeshie8
OpenStudy (anonymous):
c.d=a17-a16=-1-21=-22 a16=a+(16-1)d 21=a+15*-22 21=a-330 a=21+330=351 tn=a+(n-1)d =351+(n-1)*-22
OpenStudy (wade123):
so this ?351 - 22(n - 1)
OpenStudy (anonymous):
correct.
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OpenStudy (wade123):
thanks a lot!
OpenStudy (anonymous):
yw
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