Allison112200 Allison112200

05-03-2016
Mathematics

contestada

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

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Namizaki Namizaki

05-03-2016

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

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