At a job fair, two companies, A and B, offered their salary standards respectively: Company A promised a monthly salary of 1,500 yuan in the first year, and every year thereafter.

(1) Assume that the person has worked continuously in Company A or B for n years, and the monthly income in the nth year is an, bn, respectively.

∵Company A promises to The salary is 1,500 yuan, and each subsequent monthly salary will increase by 230 yuan compared with the previous year's monthly salary.

Company B promised that the monthly salary in the first year will be 2,000 yuan, and the monthly salary for each subsequent year will be based on the previous year's monthly salary. Increasingly by 5%,

∴an=230n+1270,

bn=2000×1.05n-1.

(2) Assume that the person has worked continuously for 10 years in Company A or B, and his total salary income is S, T,

Then S = (1500×110×92×230 )×12=304200，

T=2000(1?1.0510)1?1.05≈301869.

∵S>T, ∴Select company A.