Find the fourth term in an arithmetic sequence where the third term is 2.6 and the fifth term is -0.4

asked Jan 5, 2017 150k views

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3 votes

a3=2.6
a4=?
a5=-.4

note that
-2d=-.4-2.6
-2d=-3
-d=-3/2

d=1.5

thus the 4th term is 2.6-1.5=1.1 done

Anddt answered Jan 9, 2017

by Anddt

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