(1,25 ®IÓM) MÆT PH¼NG (Β ) SONG SONG VÍI MÆT PH¼NG (Α ) NªN (Β ) N...

2. (1,25 ®iÓm) MÆt ph¼ng

(β )

song song víi mÆt ph¼ng

(α )

^nªn

(β )

^{nhËn n} lµ mét vect¬ 0,75 ph¸p tuyÕn. Ph−¬ng tr×nh

(

β

)

^lµ: 1(x + 1) - 2(y – 2) + 2(z - 3) = 0 ⇔x – 2y + 2z – 1 = 0. Kho¶ng c¸ch gi÷a hai mÆt ph¼ng

(α )

^vµ

(β )

^lµ: = −+−

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3

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2

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6

α= ^{. 0,50}

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d

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2

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