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

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

User Rijinrv
by
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1 Answer

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

User Anddt
by
8.0k points
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