Maths-
General
Easy
Question
Let A =. If U1, U2, U3 are column matrices satisfying AU1 = , AU2 = , AU3 = and U is 3 × 3 matrix whose columns are U1, U2 and U3. Then |U| =
- 3
- 3/2
- –3
- 2
The correct answer is: 3
U1 = , U2 = , U3 =
A. U1 = =
= =
a1 = 1, b1 = –2, c1 = 1
U1 =
Similarly U2 = & U3 =
U = |U| = 3
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