Exams › JEE Main › Maths
Let Δ_r denote the determinant
[2r-1, {^mC_r}, 1; m²-1, 2^m, m+1; sin²(m²), sin²(m), sin²(m+1)].
Then the value of ∑_(r=0)^(m) Δ_r is
- 0
- 4
- 3
- 1
Correct answer: 0
Solution
The determinant Delta_r is structured such that its rows exhibit linear dependencies when summed over the range of r from 0 to m, leading to a total sum of zero. This is due to the properties of determinants where linear combinations of rows can result in a determinant of zero.
Related JEE Main Maths questions
- If [ ] represents the greatest integer less than or equal to the given real number, and -1 ≤ x < 0, 0 ≤ y < 1, 1 ≤ z < 2, then the determinant
[x] [y] [z]
[x+1] [y+1] [z]
[x] [y] [z]+1
is equal to:
- Let x, y and z be complex numbers. If Δ denotes the determinant of the matrix
[0, -y, -z; y, 0, -x; z, x, 0],
then Δ is
- For the linear system
x1 + 2x2 + 3x3 = 6
x1 + 3x2 + 5x3 = 9
2x1 + 5x2 + ax3 = b
if it is consistent and admits infinitely many solutions, then which statement must be true?
- For which value(s) of x does the determinant of the matrix
| 1 (x−3) (x−3)² |
| 1 (x−4) (x−4)² |
| 1 (x−5) (x−5)² |
become zero?
- If the determinant expression [a, b, ax+by; b, c, bx+cy; ax+by, bx+cy, 0] is considered under the conditions b²-ac<0 and a<0, what is its sign?
- Let α, β, γ be real numbers with sin α, sin β, sin γ all nonzero. Define
Δ = | sin²α sinα cosα cos²α |
| sin²β sinβ cosβ cos²β |
| sin²γ sinγ cosγ cos²γ |.
What is the greatest value Δ can attain?
⚔️ Practice JEE Main Maths free + battle 1v1 →