Mathematics

Problem

State the first term

u_1

and common difference

d

for these arithmetic sequences: (a) 5, 9, 13, 17, 21, .... (c) 23, 18, 13, 8, 3, .... (b) -4, 3, 10, 17, 24, .... (d) -6, -15, -24, -33, ....