Question

Write an equation for the nth term of the arithmetic sequence. Then find a10.

−3,−6,−9,−12,...

an=

a10=

Answer 1

-3n

a10= -30

Explanation:

the distance between -3 and -6 is 3.

if you multiply 3 by the 1st term, it's just 3, so the 3 needs to be a -3.

For a10, you plug in 10 into the equation which is -3n. and that is -30.