ab+1 |
b |
bc+1 |
c |
ca+1 |
a |
ab+1 |
b |
bc+1 |
c |
ca+1 |
a |
ab+1 |
b |
bc+1 |
c |
ca+1 |
a |
1 |
b |
1 |
c |
1 |
a |
1 |
a |
1 |
b |
1 |
c |
1 |
a |
1 |
b |
1 |
c |
1 |
a |
1 |
b |
1 |
c |
ab+1 |
b |
bc+1 |
c |
ca+1 |
a |
1 |
a |
1 |
b |
1 |
c |
A.a,b,c都是奇数 |
B.a,b,c都是偶数 |
C.a,b,c中至少有两个偶数 |
D.a,b,c中至少有两个偶数或都是奇数 |
A.假设a,b全为非正数 | B.假设a,b全为负数 |
C.假设a,b不全为正数 | D.假设a,b全不为正数 |
A.m3=n3 | B.m3<n3 |
C.m3=n3或m3<n3 | D.m3=n3且m3<n3 |
x-y |
1-xy |
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