hhhghjsjs hhhghjsjs
  • 20-01-2022
  • Mathematics
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For what value of n are the lines 4x + 6y = 9 and -3x + ny = 8 perpendicular?

Respuesta :

silirobert15
silirobert15 silirobert15
  • 20-01-2022

We have:

  • (d) 4x + 6y = 9  <=>  y = -2/3 x + 3/2
  • (d') -3x + ny = 8  <=>  y = 3/n x + 8/n

So:  (d) ⊥ (d')

=> -2/3 × 3/n = -1

=> -2/n = -1

=> n = -2/-1

=> n = 2

p/s: I'm not sure

Ok done. Thank to me :>

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