Geometria analitica Flashcards

Formule

1
Q

Punti verticali

A

y2 - y1 |

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2
Q

Punti orizzontali

A

x2 - x1 |

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3
Q

Punti in generale

A

/( x2 - x1 )^2 + ( y2 - y1 )^2

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4
Q

Retta equazione lineare

A

ax + by + c = 0

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5
Q

Retta equazione canonica

A

y = mx + q

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6
Q

Punto con retta passante

A

y - y0 = m( x - x0 )

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7
Q

Punti con retta

A

x - x1 \ x2 - x1 = y - y1 \ y2 - y1

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8
Q

Retta con punti su asse x e y

A

x \ p + y \ q = 1

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9
Q

Punto medio

A

( x1 + x2 \ 2 ; y1 + y2 \ 2 )

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10
Q

Distanza punto retta

A

d = | ax0 + by0 + c | \ /a^2 + b^2

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11
Q

Conica equazione generale

A

F ( x , y ) = Ax^2 + Bxy + Cy^2 + Dx + Ey + F = 0

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12
Q

Circonferenza equazione normale

A

x^2 + y^2 + ax + by + c = 0

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13
Q

Circonferenza equazione generale

A

kx^2 + ky^2 + kax + kby + kc = 0

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14
Q

Centro coordinate (circonferenza)

A

( xC = -a \ 2 ; yC = -b \ 2 )

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15
Q

Raggio (circonferenza)

A

r = / xC^2 + yC^2 + c

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16
Q

Ellisse definizione

A

PF1 + PF2 = 2a

17
Q

Ellissi equazione canonica (con punto medio nell’origine e fuochi sull’asse x)

A

x^2 \ a^2 + y^2 \ b^2 = 1

18
Q

Relazione 3 parametri (ellisse)

A

c^2 = a^2 - b^2

19
Q

Eccentricità (ellisse)

A

e = c \ a

e compresa tra 0 e 1

20
Q

Parabola equazione normale

A

y = ax^2 + bx + c

21
Q

Fuoco (parabola)

A

F = (-b \ 2a ; -A+1 \ 4a)

22
Q

Direttrice (parabola)

A

y = -A-1 \ 4a

23
Q

Asse di simmetria (parabola)

A

x = -b \ 2a

24
Q

Vertice (parabola)

A

V = ( -b \ 2a ; -A / 4a )

25
Q

Parabola asse y

A

x = ay^2 + by + c

Cambio y con x nelle formule

26
Q

Iperbole definizione

A

PF1 + PF2 | = 2a

27
Q

Iperbole equazione canonica

A

x^2 \ a^2 + y^2 \ b^2 = 1

28
Q

Relazione 3 parametri (iperbole)

A

c^2 = a^2 + b^2

29
Q

Eccentricità (iperbole)

A

e = c \ a

30
Q

Asintoti (iperbole)

A
y = -bx \ a
y = bx \ a
31
Q

Iperbole equilatera equazione

A

xy = k