CHO TAM GIÁC ABC CÓ G LÀ TRỌNG TÂM. GỌI I LÀ TRUNG ĐIỂM C...

Câu 35 . Cho tam giác

ABC

_có

G

là trọng tâm. Gọi

I

là trung điểm cạnh

BC

. Mệnh đề nào sau đây sai?

A.

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^

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^{MA MB MC}

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^

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^

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^

^

³

^MG

, với mọi điểm

M

_.

B.

^{GA GB GC}

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^

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^

⁰

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.

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C.

^{GB GC}

^

^

²

^GA

.

D.

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^{AB AC}

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^

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^

²

^AI

.