Question

Which one of the followings is the condition for no solution of the pair of equations given below? x + by = 3 and x + 4y = 5 options A- b=-2 B- b not equal to 4 C- b=4 , D-b=2

Answer 1

Answer:

In 1st equation y = -1/b x + 3/b

in 2nd equation y = -1/4 x + 5/4

Since these have no solution => these are parallel lines => their slope is same => -1/b = -1/4 => b = 4