A.若x2=4,则x=2 | ||
B.方程x(2x-1)=2x-1的解为x=1 | ||
C.若x2+2x+k=0有一根为2,则k=-8 | ||
D.若分式
|
1 |
2 |
x2+x-6 |
2x2-3x-2 |
A.2或-3 | B.3或-2 | C.2 | D.-3 |
x2-4 |
x2+x-6 |
A.-2 | B.2 | C.±2 | D.-3 |
|
A.a≥0 | B.a≥2 |
C.0<a≤2 | D.a为一切实数 |
x |
x+1 |
x |
3 |
a |
π |
π |
x |
A.1个 | B.2个 | C.3个 | D.4个 |
1 |
x-3 |
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