Find the common difference and write out the first four term

Find the common difference and write out the first four terms of each arithmetic sequence. c_n = 6 -2n t_n = 1/2 - 1/3n

Solution

9)c_n=6-2n

common difference =-2

4 terms are 4,2,0,-2

10)t_n =(1/2)-(1/3)n

common difference =-1/3

4 terms are (1/2)-(1/3),(1/2)-(2/3),(1/2)-(3/3),(1/2)-(4/3)

4 terms are 1/6 , -1/6 ,-1/2 ,-5/6