1+x |
1-x |
a+b |
1+ab |
b-c |
1-bc |
a+c |
1+ac |
A.-1 | B.lg2 | C.
| D.3 |
a+b |
1+ab |
b-c |
1-bc |
a+b |
1+ab |
1+
| ||
1-
|
1+ab+a+b |
1+ab-a-b |
(1+a)(1+b) |
(1-a)(1-b) |
b-c |
1-bc |
1+
| ||
1-
|
1-bc+b-c |
1-bc-b+c |
(1-c)(1+b) |
(1+a)(1-b) |
(1+a)(1+c) |
(1-a)(1-c) |
a+c |
1+ac |
1+
| ||
1-
|
1+ac+a+c |
1+ac-a-c |
(1+a)(1+c) |
(1-a)(1-c) |
1 |
200 |
A.-4 | B.2 | C.0 | D.-2 |
1+x2 |
1 |
2 |
A.10 | B.0.01 | C.100 | D.1000 |
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