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Mathematics
Mathematics
Problem
A plane passing through
(
1
,
1
,
1
)
(1, 1, 1)
(
1
,
1
,
1
)
cuts positive direction of coordinate axes at
A
,
B
A, B
A
,
B
and
C
C
C
, then the volume of tetrahedron
O
A
B
C
OABC
O
A
B
C
satisfies a.
V
≤
9
2
V \le \frac{9}{2}
V
≤
2
9
b.
V
≥
9
2
V \ge \frac{9}{2}
V
≥
2
9
c.
V
=
9
2
V = \frac{9}{2}
V
=
2
9
d. None of these
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