Question

19．如果實(shí)數(shù)m在數(shù)軸上所對(duì)應(yīng)點(diǎn)在實(shí)數(shù)2-m在數(shù)軸上所對(duì)應(yīng)點(diǎn)的左邊，那么m的取值范圍是m＜1．

Answer 1

分析 根據(jù)數(shù)軸的特點(diǎn)列出關(guān)于m的不等式，求出m的取值范圍即可．

解答 解：∵實(shí)數(shù)m在數(shù)軸上所對(duì)應(yīng)點(diǎn)在實(shí)數(shù)2-m在數(shù)軸上所對(duì)應(yīng)點(diǎn)的左邊，
∴m＜2-m，
解得m＜1．
故答案為：m＜1．

點(diǎn)評(píng) 本題考查的是實(shí)數(shù)與數(shù)軸，熟知數(shù)軸上右邊的點(diǎn)總比左邊的大是解答此題的關(guān)鍵．