Circonferenza e parabola Flashcards

1
Q

parabola eq.

A

y= ax^2 + bx+c

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2
Q

circo equazione

A

x^2+y”+ax+by+c=0

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3
Q

Centro circonferenza

A

C=(-a/2; -b/2)

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4
Q

Raggio circo

A

r=√(-a/2)^2 + (-b/2)^2 -c

tutto sotto radice

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5
Q

equazione noto centro e raggio

A

(x-xc)^2 + (y-yc)^2-r^2

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6
Q

due punti estremi del diametro

A

C= xa+xb; ya+yb

/ 2 /2

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7
Q

eq. con 3 punti

A

sistema sostituire 3 punti

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8
Q

pos di una retta rispetto ad una circonferenza

A

sistema
y=mx+q e poi sostituire nel eq. circo
trovare x -> retta secante, tangente o esterna

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