Arithmetic and geometric sequences

Given the arithmetic sequence 11, 7, 3,... Find the 301^{st} term, a_{301}
a_{n}= a_{1}+ (n1) d
a_{301}= 11+ (3001)·(4)=1189
Compute the 24 (th) term of the arithmetic sequence where
the first terms are: 4,0,4,8,...

