In ABC, AB (2 x) cm, BC (x 1) cm and ABC 120 a Show that AC 2 x 2 x 7 b Find the value of x for which AC has a minimum value ...

To solve this problem well use the Law of Cosines and the concept of minimizing a quadratic expre ...

In ABC, AB = (2 x) cm, BC = (x + 1) cm and ABC =

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In △ABC, AB = (2 − x) cm, BC = (x + 1) cm and ∠ABC = 120°.

a. Show that AC² = x² − x + 7.

b. Find the value of x for which AC has a minimum value.

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Edexcel AS And A Level Mathematics Pure Mathematics Year 1/AS

ISBN: 9781292183398

1st Edition

Authors: Greg Attwood

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Question Posted: Jul 15, 2023 02:54 AM

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In ABC, AB = (2 x) cm, BC = (x + 1) cm and ABC =

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Edexcel AS And A Level Mathematics Pure Mathematics Year 1/AS

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