JEE MATHEMATICS MCQ: PAIR OF STRAIGHT LINES

1 Medium

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Application +4 | -1

The value of

k

for which the lines

7 x-8 y+5=0

3 x-4 y+5=0

and

4 x+5 y+k=0

are concurrent is given by

View answer and explanation

Correct option: A

-45

Option A (-45) is correct because the determinant of the coefficients of the concurrent lines must be zero, leading to k = -45.

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