Let the system of linear equations
4x - λy + 2z = 0
2x + y + z = 0
μx + 2y + 3z = 0, λ, μ ∈ R
has a non-trivial solution. Then which of the following is true?
Let the system of linear equations
4x - λy + 2z = 0
2x + y + z = 0
μx + 2y + 3z = 0, λ, μ ∈ R
has a non-trivial solution. Then which of the following is true?
For a system of linear homogeneous equations to have a non-trivial solution, the determinant of the coefficient matrix must be zero.
Δ = | 4 λ 2 |
| 2 -1 | = 0
| μ 2 3 |
To simplify, perform the row operation R? → R? - 2R? :
Δ = | 0 λ+2 0 |
| 2 -1 | = 0
| μ 2 3 |
Expand the determinant along the first row:
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Similar Questions for you
|2A| = 27
8|A| = 27
Now |A| = α2–β2 = 24
α2 = 16 + β2
α2– β2 = 16
(α–β) (α+β) = 16
->α + β = 8 and
α – β = 2
->α = 5 and β = 3
|A| = 3
|B| = 1
->|C| = |ABAT| = |A|B|A7| = |A|2|B|
= 9
->|X| = |A|C|2|AT|
= 3 * 92 * 3 = 9 * 92 = 729
|A| = 2
&nb
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