a |
x |
3 |
x |
3 |
b |
x |
3 |
3 |
x |
3 |
a |
b |
1 |
2 |
2x |
3 |
| ||
2 |
2x |
3 |
1 |
2 |
2x |
3 |
| ||
2 |
2x |
3 |
| ||
2 |
2x |
3 |
π |
3 |
| ||
2 |
2π | ||
|
π |
2 |
2x |
3 |
π |
3 |
3π |
2 |
π |
4 |
7π |
4 |
π |
4 |
7π |
4 |
a2+c2-b2 |
2ac |
a2+c2-ac |
2ac |
2ac-ac |
2ac |
1 |
2 |
1 |
2 |
π |
3 |
π |
3 |
2x |
3 |
π |
3 |
5π |
9 |
π |
3 |
π |
2 |
5π |
9 |
π |
2 |
π |
3 |
2x |
3 |
π |
3 |
3 |
2x |
3 |
π |
3 |
| ||
2 |
| ||
2 |
3 |
| ||
2 |
x+3 |
A.{x|x≥-3} | B.{x|x>-3} | C.{x|x≤-3} | D.{x|x<-3} |
1 |
x |
AP |
AB |
AC |
A.(0,4] | B.[1,4] | C.[1,2] | D.(0,1]∪[2,4] |
|
A.(-∞,1) | B.(-∞,1] | C.(0,1) | D.(0,1] |
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