-2x3 |
-2x |
x2 |
A.①② | B.①③ | C.②④ | D.③④ |
-2x3 |
-2x |
-2x3 |
-2x |
x2 |
x2 |
A.f(x)=
| ||||
B.f(x)=
| ||||
C.f(x)=x和g(x)=(
| ||||
D.f(x)=x2-2x-1和g(t)=t2-2t-1 |
A.M={-2,0,2},P={-4,0,4},f:M中数的平方 |
B.M={0,1},P={-1,0,1},f:M中数的平方根 |
C.M=Z,P=Q,f:M中数的倒数 |
D.M=R,P=R+,f:M中数的平方 |
A.y=
| B.y=
| C.y=
| D.y=
|
(x+3)(x-5) |
x+3 |
x+1 |
x-1 |
(x+1)(x-1) |
x2 |
3 | x4-x3 |
x-1 |
2x-5 |
A.(1)(2) | B.(2)(3) | C.(4) | D.(3)(5) |
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