How do you write the first five terms of the arithmetic sequence given a_1=-2.6, d=-0.4?

2 Answers
Jul 21, 2017

a_1=-2.6

a_2=-3

a_3=-3.4

a_4=-3.8

a_5=-4.2

Explanation:

We know that :

a_n=a_1+(n-1)d

So :

a_2=-2.6-0.4=-3

a_3=-2.6+2*(-0.4)=-3.4

a_4=-2.6+3*(-0.4)=-3.8

a_5=-2.6+4*(-0.4)=-4.2

Jul 21, 2017

-2.6,-3.0,-3.4,-3.8,-4.2

Explanation:

"to obtain the terms add the common difference d to"
"each preceding term"

a_1=-2.6

a_2=-2.6-0.4=-3.0

a_3=-2.2-0.4=-3.4

"and so on for remaining terms"