Question

as retas de equaçao A=x+2y-a=0 e b=4x+ay-7=0 sao perpendiculares .o valor de A e

Answer 1

Olá Keshinny

A: x + 2y - a = 0
B: 4x + ay - 7 = 0

2y = -x + a
y = (-x + a)/2

m1 = -1/2

ay = -4x + 7
y = (-4x + 7)/a

m2 = -4/a

m1*m2 = -1

-1/2*(-4/a) = -1

4/2a = -1

-2a = 4

a = -2 

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