JEE Main 20137 April
- Exam
- JEE Main
- Year
- 2013
- Date
- 7 April
- Subject
- Mathematics
- Chapter
- Determinants
JEE Main 2013 · 7 April · Mathematics · Determinants
The number of values of k , for which the system of equations : (k...
The number of values of , for which the system of equations :
\left(k + 1\right)x + 8y = 4kkx + \left(k + 3\right)y = 3k - 1$
has no solution, is :Options
- A
- B
- CInfinite
- D
Correct answer
D.
Step-by-step solution
For to have no solution,
\left(k + 1\right)\left(k + 3\right) = 8k ⇒ {k}^{2} - 4k + 3 = 0⇒ k = 1, 3k = 1, \dfrac{8}{k + 3} = \dfrac{4k}{3k - 1}∴ k = 3$
Hence, only one value