February 25, 2017

Homework Help: maths

Posted by Anonymous on Sunday, February 21, 2010 at 8:10am.

three number form an arithmetric sequence. Their sum is 24.
A)If 'a' is the first number and 'd' the common difference, show that a+d=8
B)If the first number is decreased by 1 and the second number by 2, the three numbers then form a geometric sequence. Find the three terms.

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