本课配套习题挑战模式1/5
若mn>0,则 的值为( )
A: 1 |
B: -1 |
C: 1或-1 |
D: 1或-3 |
- 提示1:PHA+55SxbW7vvJ4w77yM5Y+v55+lbe+8jG7lkIzlj7fvvIzmiYDku6XliIZt77yMbuWQjOS4uuato+WSjOWQjOS4uui0n+S4pOenjeaDheWGteWIhuWIq+iuqOiuujwvcD4=
- 提示2:PHA+be+8jG7lkIzkuLrmraPml7bvvIzljp/lvI89MSsxLTE9MTwvcD4=
- 提示3:PHA+be+8jG7lkIzkuLrotJ/ml7bvvIzljp/lvI89LTEtMS0xPS0zPC9wPg==
- 答案:RA==
PGRpdj48cCBhbGlnbj0ibGVmdCI+6Kej77ya55Sx5LqObW7vvJ4w77yM5Y+v55+lbe+8jG7lkIzlj7c8L3A+PHAgYWxpZ249ImxlZnQiPm3vvIxu5ZCM5Li65q2j5pe277yM5Y6f5byPPTErMS0xPTE8L3A+PHAgYWxpZ249ImxlZnQiPm3vvIxu5ZCM5Li66LSf5pe277yM5Y6f5byPPS0xLTEtMT0tMzwvcD48L2Rpdj4=
本课配套习题挑战模式2/5
若|a|=4,|b|=2,且|a+b|=a+b,那么a﹣b的值只能是( )
A: 2 |
B: -2 |
C: 6 |
D: 2或6 |
- 提示1:PHA+5piT55+lIGE9wrE077yMYj3CsTLvvIzlj4h8YStifD1hK2Ig5Y+v5b6XYSti4omlMOOAguKItGE9NO+8jGI9MuaIlmE9NO+8jGI977mjMjwvcD4=
- 答案:RA==
PGRpdj48cCBhbGlnbj0ibGVmdCI+6Kej77ya55Sx5bey55+l5Y+v5b6XYT3CsTTvvIxiPcKxMu+8jOWPiHxhK2J8PWErYiDlvpdhK2LiiaUw44CCPC9wPjxwIGFsaWduPSJsZWZ0Ij7iiLRhPTTvvIxiPTLmiJZhPTTvvIxiPe+5ozI8L3A+PC9kaXY+
本课配套习题挑战模式3/5
已知x为实数,且|3x﹣1|+|4x﹣1|+|5x﹣1|+…+|17x﹣1|的值是一个确定的常数,则这个常数是( )
A: 5 |
B: 10 |
C: 15 |
D: 75 |
- 提示1:PHA+5oyJeOeahOWPluWAvOadpeWIhuexu+iuqOiuuuWOu+e7neWvueWAvDwvcD4=
- 提示2:PHA+5Y+v5YiG5Li6PGltZyBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzIxLzQ0L3JCQUNFMU1LdmpmUWJCNWFBQUFFWkc5M1N4czc1My5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMjEvNDQvckJBQ0UxTUt2amZRYkI1YUFBQUVaRzkzU3hzNzUzLnBuZyIgaGVpZ2h0PSI0MiIgd2lkdGg9IjM4MiI+MTbkuKrljLrpl7Q8L3A+
- 提示3:PHA+5b2TPGltZyBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0ZFLzU5L3JCQUNGRk1LdmpmaXJDbVpBQUFDS2hWNmpDQTM0Ni5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvRkUvNTkvckJBQ0ZGTUt2amZpckNtWkFBQUNLaFY2akNBMzQ2LnBuZyIgaGVpZ2h0PSI0MiIgd2lkdGg9Ijk0Ij7ml7bvvIzljp/lvI89Ne+8jOaYr+W4uOaVsDwvcD4=
- 答案:QQ==
PGRpdj48aW1nIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMjMvODQvckJBQ0UxTU1hSXp5Y3dEc0FBQVMyRDJDMko4MzAyLnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8yMy84NC9yQkFDRTFNTWFJenljd0RzQUFBUzJEMkMySjgzMDIucG5nIiBhbHQ9IiIgc3R5bGU9IndpZHRoOiA1MDBweDsgaGVpZ2h0OiAxMTVweDsiPjwvZGl2Pg==
本课配套习题挑战模式4/5
已知x≠﹣1,0,1,则 的值可能是( )
A: 比3大的数 |
B: 比﹣3小的数 |
C: ±1,±3 |
D: 比﹣3大,并且比3小的数 |
- 提示1:PHA+5YiGeO+8nO+5ozHvvIzvuaMx77yceO+8nDDvvIww77yceO+8nDHvvIx477yeMeWbm+enjeaDheWGteiuqOiuujwvcD4=
- 答案:Qw==
PGRpdj48cD7op6PvvJrlvZN477yc77mjMeaXtu+8jOWOn+W8jz3vuaMx77mjMe+5ozE977mjM++8mzwvcD48cD7lvZPvuaMx77yceO+8nDDml7bvvIzljp/lvI8977mjMe+5ozErMT3vuaMx77ybPC9wPjxwPuW9kzDvvJx477ycMeaXtu+8jOWOn+W8jz3vuaMxKzErMT0x77ybPC9wPjxwPuW9k3jvvJ4x5pe277yMIOWOn+W8jz0xKzErMT0z77yOPC9wPjwvZGl2Pg==
本课配套习题挑战模式5/5
a、b、c为非零有理数,且a+b+c=0,则 的值等于( )
A: 3 |
B: 1 |
C: -1 |
D: 不唯一确定 |
- 提示1:PHA+6L+Z5LiJ5Liq5pWw5Lit5pei5pyJ5q2j5pWw5Y+I5pyJ6LSf5pWw77yM5LiN5aao6K6+Ye+8njDvvIxj77ycMO+8jOiAjGLnmoTnrKblj7fkuI3noa7lrprvvIzlj6/ku6XliIZi77yeMOWSjGLvvJww5Lik56eN5oOF5Ya16L+b6KGM6K6o6K6677yMPC9wPg==
- 提示2:PHA+5b2TYu+8njDml7bvvIzljp/lvI89IDxpbWcgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9GRS81OS9yQkFDRkZNS3ZqLXlWQkNkQUFBQzdVN01wYW8yMTkucG5nIiBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0ZFLzU5L3JCQUNGRk1LdmoteVZCQ2RBQUFDN1U3TXBhbzIxOS5wbmciIGhlaWdodD0iNDIiIHdpZHRoPSIyNjAiPu+8mzwvcD4=
- 提示3:PHA+5b2TYu+8nDDml7bvvIzljp/lvI89PGltZyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzIxLzQ1L3JCQUNFMU1LdmpfeUhub0RBQUFEQ0ZTSnpodzQ4OS5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMjEvNDUvckJBQ0UxTUt2al95SG5vREFBQURDRlNKemh3NDg5LnBuZyIgaGVpZ2h0PSI0MiIgd2lkdGg9IjI4MyI+PC9wPg==
- 答案:Qw==
PGRpdj48aW1nIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMDYvMzAvckJBQ0ZGTVFQSGFpWHEtcUFBQVY3RWVYamRJMzU4LnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8wNi8zMC9yQkFDRkZNUVBIYWlYcS1xQUFBVjdFZVhqZEkzNTgucG5nIiBhbHQ9IiIgc3R5bGU9IndpZHRoOiAzNDlweDsgaGVpZ2h0OiAxNDVweDsiPjxicj48L2Rpdj4=