AMC12 2000 A
AMC12 2000 A · Q5
AMC12 2000 A · Q5. It mainly tests Absolute value.
If $|x - 2| = p$, where $x < 2$, then $x - p =$
如果 $|x - 2| = p$,其中 $x < 2$,则 $x - p =$
(A)
−2
$-2$
(B)
2
2
(C)
2 − 2p
$2-2p$
(D)
2p − 2
$2p-2$
(E)
|2p − 2|
$|2p-2|$
Answer
Correct choice: (C)
正确答案:(C)
Solution
When $x < 2,$ $x-2$ is negative so $|x - 2| = 2-x = p$ and $x = 2-p$.
Thus $x-p = (2-p)-p = 2-2p$.
$\boxed{\mathbf{(C)}}$
当 $x < 2,$ 时,$x-2$ 为负,所以 $|x - 2| = 2-x = p$,从而 $x = 2-p$。
因此 $x-p = (2-p)-p = 2-2p$。
$\boxed{\mathbf{(C)}}$
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