The number of values of k , for which the system of equations : k + 1 x + 8 y = 4 k k x + k + 3 y = 3 k - 1…

The number of values of k, for which the system of equations :

k+1x+8y=4k

kx+k+3y=3k-1

has no solution, is :
  1. 2
  2. 3
  3. Infinite
  4. 1

Solution

For a1x+b1y=c1anda2x+b2y=c2 to have no solution,

a1a2=b1b2c1c2

k+1k=8k+34k3k-1

k+1k+3=8kk2-4k+3=0

k=1,3

but, for k=1,8k+3=4k3k-1

k=3

Hence, only one value

Asked in: JEE Main 2013 (07 Apr)

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