ExamBro
ExamBro
JEE Mains · Maths · STD 12 - 3 and 4 . metrices and determinant

\(\lambda\) तथा \(\mu\) के वे मान जिनके लिए समीकरण निकाय \(x+y+z=6,3 x+5 y+5 z=26, x+2 y+\lambda z=\mu\) का कोई हल नहीं हैं,

  1. A \(\lambda=3, \mu \neq 10\)
  2. B \(\lambda \neq 2, \mu=10\)
  3. C \(\lambda=3, \mu=5\)
  4. D \(\lambda=2, \mu \neq 10\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(\lambda=2, \mu \neq 10\)

Step-by-step Solution

Detailed explanation

\(D=\left|\begin{array}{lll}1 & 1 & 1 \\ 3 & 5 & 5 \\ 1 & 2 & \lambda\end{array}\right|=0\) \((5 \lambda-10)-1(3 \lambda-5)+(6-5)=0\) \(2 \lambda-10+5+1=0\) \(\lambda=2\) only one option satisfy Atleast one If \(\mathrm{D}_{1}, \mathrm{D}_{2}, \mathrm{D}_{3} \neq 0\)
Same subject
Explore more questions on app
From JEE Mains
Explore more questions on app