SOLUTION: Hi yes I want to know the 100th and nth term of 80,110,140 Thank you !

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Question 1151511: Hi yes I want to know the 100th and nth term of
80,110,140
Thank you !

Found 2 solutions by josgarithmetic, josmiceli:
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
Arithmetic sequence, increase by 30 for each successive term

You can do this! 
TERM INDEX     TERM VALUE 
 1             80
 2             80+30
 3             80+2*30
 4             80+3*30
.
.
.


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Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+a%5Bn%5D+=+a%5B1%5D+%2B+%28+n-1+%29%2Ad+
80, 110, 140
The common difference, +d+, is +30+
The 1st term, +a%5B1%5D+=+80+
---------------------------------
+n+=+100+
+a%5Bn%5D+=+80+%2B+%28+n-1+%29%2A30+
+a%5B100%5D+=+80+%2B+%28+100+-+1+%29%2A30+
+a%5B100%5D+=+80+%2B+2970+
+a%5B100%5D+=+3050+
----------------------------
The nth term is:
+a%5Bn%5D+=+80+%2B+%28+n-1+%29%2A30+
+a%5Bn%5D+=+80+%2B+30n+-+30+
+a%5Bn%5D+=+30n+%2B+50+