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LenaWriter [7]
3 years ago
6

Find a122 of the sequence 5, 8, 11

Mathematics
1 answer:
ruslelena [56]3 years ago
8 0
5, 8, 11, ... is an arithmetic sequence where:

a_1=5;\ a_2=8;\ d=8-5=3\\\\a_n=a_1+(n-1)d\to a_n=5+(n-1)\cdot3=5+3n-3=2+3n\\\\therefore\\\\a_{122}=2+3\cdot122=2+366=368
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