Làm hộ mình với…Thanks

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Làm hộ mình với…Thanks
lam-ho-minh-voi-thanks

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Dâu 1 year 2020-11-14T03:38:08+00:00 1 Answers 71 views 0

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    2020-11-14T03:39:56+00:00

    Ta có:

    `vec{OH} + vec{OB} + vec{OC} + vec{OD} + vec{OH} + vec{OK}`

    `= 2vec{OH} + (vec{OB} + vec{OC}) + vec{OD} + vec{OK}`

    `= 2vec{OH} + 2vec{OK} + vec{OD} + vec{OK}`

    `= vec{KH} + vec{HK} + vec{OD} + vec{OK}`

    `= vec{BO} + vec{OK}`

    `= vec{BK} ne vec{0}`

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )