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In an equilateral DeltaABC, D is a point...

In an equilateral `DeltaABC`, D is a point on BC dividing BC in 3 equal parts then which one is true option.

A

`9AD^(2)=7AB^(2)`

B

`AD^(2)=AB^(2)`

C

`4AD^(2)=3AB^(2)`

D

None of these

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