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Let D be the middle point of the side BC...

Let D be the middle point of the side BC of a triangle ABC. If the triangle ADC is equilateral, then `a^(2) : b^(2) : c^(2)` is equal to

A

`14 xx 3^(1/2)`

B

`42 xx 3^(1/2)`

C

`14 xx 3^(3/4)`

D

`42 xx3^(1/2)`

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