Question

Dada a função f(x) = x2 - 2x + 1, determine o ponto mínimo:( xv , yv ) :
( a ) ( 1, 0 ) ( b ) ( 2, 1 ) ( c ) ( -1, 3 ) ( d ) ( -2, 0 ) ( e ) ( 0, -1)

Answer 1

Resposta:

x² - 2x + 1 = 0

∆ = b² - 4ac

∆ = (-2)² - 4 . 1 . 1

∆ = 4 - 4

∆ = 0

xv = -b/2a

xv = -(-2)/2.1

xv = 2/2

xv = 1

yv = -∆/4a

yv = -0/4.1

yv = -0/4

yv = 0

(1 , 0)

Letra A