The number of integral values of so that the abscissa of point of intersection of lines and is also an integer, is:
- (A)1
- (B)3
- (C)0
- (D)2✓ Correct
Answer: (D)
Solution
Substituting into gives , so and
An integral abscissa needs to be a divisor of , so , which gives . Only and are integers, so the number of integral values of is .
An integral abscissa needs to be a divisor of , so , which gives . Only and are integers, so the number of integral values of is .
JEE Main · 2021 · 18 Mar 2021 · Shift 1 · Single correct option