1.

2. Find thevalue p. if the stright line3x+py-1=0 ,7x- 3y=0 aremutually perpendicular​

Answer»

Slope of general EQUATION of line ax+by+c=0 is m=−coefficient of ycoefficient of x 

THEREFORE,

Slope of line 2x+3y−3=0 is =−32

and slope of line x+ky+7=0 is −k1

Now we know that two lines are perpendicular if their PRODUCT of slopes is −1

⇒−32×−k1=−1

⇒k=−32


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