Question

1)The algebraic expression of arithmetic sequence is 3-5n
a) find its common difference.
b) find the first term.
c) form the sequence​

Answer 1

Answer:

$to \: find \: first \: term$

$a1 = 3 - 5(1) \\ 3 - 5 = - 2 \\ a2 =3 - 5(2) \\ = - 7 \\ common \: difference \\ = - 7 - ( - 2) \\ = - 7 + 2 \\ = - 5 \\ sequence \\ - 2. - 7. - 13. - 18$