Question

6 de la testul 1, va rog!

Answer 1

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Testul 1, exercitiul 6  ｡◕‿◕｡

f : R → R

f ( x ) = 3x² - 2x + 1

★★Varful parabolei are coordonatele:  V ( -b/2a ; -Δ/4a )

a = 3  ;  b = -2  ;  c = 1

Δ = b² - 4ac = ( -2 )² - 4 · 3 · 1 = 4 - 12 = -8

x varf = -b / 2a = -(-2) / 6 = 2 / 6 = 1 / 3

y varf = -Δ / 4a = -(-8) / 12 = 8 / 12 = 2 / 3

⇒ V ( 1 / 3 , 2 / 3 )

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