Question

if the lines 2x+3y-10=0 and 3x-ay-25=0 are perpendicular then the value of a is

Answer 1

Answer:

The first straighr line D1 : 2x+ky=11

And 2nd straight line D2 : 5x-3y=-4

D1 => y= -2x/k +11/k

D2 => y= 5x/3 +4/3

D1 is perpendicular to D2 only if product coefficient of their slope is = -1.

=>( -2/k) *(5/3)=-1 => k/2 = 5/3

=> k=10/3

Step-by-step explanation:

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Answer 2

it is a Gp

solve it with gp method