,

so:

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given that:

prove that:

**3.**

given that:

prove that

**4.**

Given a two vector

prove that a perpendicular two vector to

I suppose, the contant term -1 is missing in the question. Am I right?

ah yeh, i thought it looked a little strange, ill change in the question

]]>(ar^3 - a) = 4(ar^2 - ar)

=> a(r^3 - 1) = 4ar(r - 1)

=> r^3 - 4r^2 + 4r -1 = 0

I suppose, the contant term -1 is missing in the question. Am I right?

With regards

Moses

A geometric progression **U** has first term **a**, where

a) show that

,b) show that

c) hence find two possible values for the common ratio, giving youre answers in exact form

d) for the value of r for which the progression is convergenet prove that

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