Q. 235.0( 2 Votes )
The value of <spa A. 1
B. –1
C. 2
D. 
Answer :
When the straight lines 3x + 6y + 7 = 0 and 2x + ky = 5 are perpendicular the product of their slopes should be equal to –1 .
Slope of 3x + 6y + 7 = 0 is:
; (
)
Slope of 2x + ky = 5 is:
Now we have .
∴ when we substitute the values of m1 and m2 we get:
⇒
⇒ 1 = (–1)×k
⇒ 1 = –k or k = –1
Rate this question :
How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Doubt Session47 mins
Section Formula53 mins
Basics of Coordinate Geometry53 mins
Distance Formula52 mins








Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
view all courses
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation


RELATED QUESTIONS :
Find the equation
Tamil Nadu Board - MathA triangle has ve
Tamil Nadu Board - MathFind the equation
Tamil Nadu Board - MathBy using the conc
Tamil Nadu Board - MathFind the equation
Tamil Nadu Board - MathFind the equation
Tamil Nadu Board - MathFind the equation
Tamil Nadu Board - MathFind the equation
Tamil Nadu Board - MathFind the equation
Tamil Nadu Board - MathThe vertices of Δ
Tamil Nadu Board - Math