bjshivers2422 bjshivers2422
  • 25-03-2019
  • Mathematics
contestada

x = 2t – 1
y = t2 + 5, -4 ≤ t ≤ 4
Graph this please

Respuesta :

Ashraf82
Ashraf82 Ashraf82
  • 25-03-2019

Answer:

y = x²/4 + x/2 + 21/4 ⇒ -9 ≤ x ≤ 7

Step-by-step explanation:

∵ x = 2t - 1

∴ 2t = x + 1 ⇒ t = (x + 1)/2

∵ y = t² + 5

∴ y = [(x + 1)/2]² + 5 = (x² + 2x + 1)/4 + 5

  y = x²/4 + x/2 + 1/4 + 5 = x²/4 + x/2 + 21/4

∵ -4 ≤ t ≤ 4

∴ -9 ≤ x ≤ 7

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