Subject: Geometric Sequences
Name: Jillian
Who are you: Student

I am doing an assignment for an MCR 3U class and I need help with one of the questions.

Find x so that 2x, x + 5, x - 7 are consecutive terms of a geometric sequence.


Hi Jillian.

A geometric sequence is one in which the ratio of consecutive terms is constant.

That means in your case:
(x + 5 ) / 2x = (x - 7) / (x + 5)

Solve for x.

Stephen La Rocque>