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

Answer:

#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

Answer:

#-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"#