本课配套习题挑战模式1/5
已知|a+b|+|a﹣b|﹣2b=0,在数轴上给出关于a,b的四种位置关系如图所示,则可能成立的有( )种
A: 1 |
B: 2 |
C: 3 |
D: 4 |
- 提示1:PHA+5qC55o2u57ud5a+55YC855qE5Yeg5L2V5oSP5LmJ55Sx5q+P5Liq5pWw6L205a+5fGErYnwrfGHvuaNifO+5ozJiPTDvvIzov5vooYzliIbmnpDliKTmlq3mmK/lkKbmiJDnq4s8L3A+
- 答案:Qg==
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
本课配套习题挑战模式2/5
已知a、b、c在数轴上位置如图:则代数式|a|+|a+b|+|c﹣a|﹣|b﹣c|的值等于( )
A: ﹣3a |
B: 2c﹣a |
C: 2a﹣2b |
D: b |
- 提示1:PHA+55SxYe+8jGLvvIxj5Zyo5pWw6L205LiK55qE5a+55bqU5L2N572u5Y+v55+l77yaYu+8nGHvvJww77ycY++8jOWNs+WPr+WIpOaWree7neWvueWAvOespuWPt+WGheaVsOeahOespuWPt++8jOS7juiAjOWOu+aOiee7neWvueWAvOespuWPt++8jOWujOaIkOWMlueugC48L3A+
- 答案:QQ==
PGRpdj48cCBhbGlnbj0ibGVmdCI+6Kej77yafGF8K3xhK2J8K3xj77mjYXzvuaN8Yu+5o2N8Pe+5o2HvuaPvvIhhK2LvvIkr77yIY++5o2HvvIkrYu+5o2M977mjM2E8L3A+PC9kaXY+
本课配套习题挑战模式3/5
在式子|x+1|+|x+2|+|x+3|+|x+4|中,用不同的x值代入,得到对应的值,在这些对应值中,最小的值是( )
A: 1 |
B: 2 |
C: 3 |
D: 4 |
- 提示1:PHA+5qC55o2u57ud5a+55YC855qE5Yeg5L2V5oSP5LmJ5rGC6KejPC9wPg==
- 提示2: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
- 答案:RA==
PGRpdj48aW1nIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMjMvN0IvckJBQ0UxTU1aZ2Z4QlNoZEFBQVl4amNtMm9JODE3LnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yMy83Qi9yQkFDRTFNTVpnZnhCU2hkQUFBWXhqY20yb0k4MTcucG5nIiBhbHQ9IiIgc3R5bGU9IndpZHRoOiA1NjBweDsgaGVpZ2h0OiAxMDdweDsiPjwvZGl2Pg==
本课配套习题挑战模式4/5
当式子|x﹣1|+|x﹣2|+|x﹣3|+…+|x﹣1997|取得最小值时,实数x的值等于( )
A: 999 |
B: 998 |
C: 1997 |
D: 0 |
- 提示1: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
- 答案:QQ==
PGRpdj48aW1nIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMDAvOEEvckJBQ0ZGTU1aWnJ3b3ZFMEFBQU5KMWVHV0JjNjcyLnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8wMC84QS9yQkFDRkZNTVpacndvdkUwQUFBTkoxZUdXQmM2NzIucG5nIiBhbHQ9IiIgc3R5bGU9IndpZHRoOiA0ODJweDsgaGVpZ2h0OiA4M3B4OyI+PC9kaXY+
本课配套习题挑战模式5/5
若y=|x﹣1|+|x﹣2|+|x﹣3|+…+|x﹣19|,y的最小值为( )
A: 45 |
B: 95 |
C: 90 |
D: 190 |
- 提示1: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
- 答案:Qw==
PGRpdj48aW1nIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMjMvNzgvckJBQ0UxTU1aUURBRjZqWUFBQVFPbVlaZFdZNDUxLnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8yMy83OC9yQkFDRTFNTVpRREFGNmpZQUFBUU9tWVpkV1k0NTEucG5nIiBhbHQ9IiIgc3R5bGU9IndpZHRoOiA1NTlweDsgaGVpZ2h0OiA2NXB4OyI+PC9kaXY+