Question

MCQ please answer correct answer​

Answer 1

$\sf Option\: iii) \:if \:b\:≠\:4$

Answer:

The equation can be written as.

$\sf4x - bx - 8 + 1 + a = 0 \\ \sf \: \: \: \: \: \: \: x(4 - b) - 7 + a = 0$

For unique solution, Coefficient of x should not be equal to zero.

So, $\sf4 - b ≠ 0 \\ \sf \: \: \: \: \: \: \: b ≠ 4$