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1 Unit 1: Pure Mathematics A

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Question 390

In triangle ABCABCABC, AB⃗=2i+5j\vec{AB} = 2\mathbf{i} + 5\mathbf{j}AB=2i+5j and AC⃗=7i+7j\vec{AC} = 7\mathbf{i} + 7\mathbf{j}AC=7i+7j.

Show that ABC ABC\,ABC is an isosceles triangle.

[3]
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1 Unit 1: Pure Mathematics A Questions

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