Question

5. In an equilateral triangle ABC, D is a point on side BC
such that BD=1/3 BC. Prove that 9 AD^2 = 7 AB^2.
(^2 - it's means square)
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3 marks question
answer correctly and help me In solvoing this​

Answer 1

Answer:

this is the answer

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Answer 2

I hope it will help you

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