CHO TAM GIÁC ABC VÀ I THỎA IA 3...

câu 103. - ON THI TOAN 10 CO DAP AN

Toán ON THI TOAN 10 CO DAP AN

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Đáp án tham khảo

Câu 103.

Cho tam giác ABC và I thỏa

^IA

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^

³

^

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^

^

^

^

^

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^IB

. Đẳng thức nào sau đây là đẳng thức

đúng?

A.

^{CI CA}

^

^

^

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^

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^

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^

³

^CB

B.

^CI

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^

¹

₂



^

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^

^

^

^

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^

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^

³

^{CB CA}

^

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^

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^

^

^

^

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^

^

^



D.

^CI

^

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^

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^

^

^

^

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^

^

^

^

^

^

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^

^

^

³

^{CB CA}

^

^

^

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^

^

^

^

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^

C.

^CI

^

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^

^

^

^

^

^

^

^

^

^

¹

₂

^

^

^

^

^

^

^

^

^

^

^

^

^

^



^CA

^

^

^

^

^

^

^

^

^

^

^

^

^

^

^

³

^CB

















