Homework Help: college

Posted by KIM on Tuesday, June 8, 2010 at 11:52pm.

The first difference of a sequence is 6, 10,14,18. The sum of the first two terms of the original sequence is 24. Find the first three term of the original sequence. the first term of the original sequence is?

Math? needs help - SraJMcGin, Wednesday, June 9, 2010 at 2:24am
Select the name of the School Subject carefully or the right teacher will not even see your post. the Subject is NOT "college."

Sra
college - Reiny, Wednesday, June 9, 2010 at 6:37am
let the first three terms be a, b, and c

we know
a+b = 24 (#1)
b-a = 6 (#2)
c-b =10 (#3)

add 1 and 2
2b = 30
b=15

in 1 ---> a+15 = 24 ,
a = 9

in 3
c - 15 = 10
c = 25

a=9
b=15
c=25

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