(2x-5)/(x^2-6x-7)1/(x-3)

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Solution for (2x-5)/(x^2-6x-7)1/(x-3) equation:


D( x )

x-3 = 0

x^2-(6*x)-7 = 0

x-3 = 0

x-3 = 0

x-3 = 0 // + 3

x = 3

x^2-(6*x)-7 = 0

x^2-(6*x)-7 = 0

x^2-6*x-7 = 0

x^2-6*x-7 = 0

DELTA = (-6)^2-(-7*1*4)

DELTA = 64

DELTA > 0

x = (64^(1/2)+6)/(1*2) or x = (6-64^(1/2))/(1*2)

x = 7 or x = -1

x in (-oo:-1) U (-1:3) U (3:7) U (7:+oo)

(2*x-5)/(x^2-(6*x)-7) < 1/(x-3) // - 1/(x-3)

(2*x-5)/(x^2-(6*x)-7)-(1/(x-3)) < 0

(2*x-5)/(x^2-6*x-7)-(x-3)^-1 < 0

(2*x-5)/(x^2-6*x-7)-1/(x-3) < 0

x^2-6*x-7 < 0

x^2-6*x-7 = 0

x^2-6*x-7 = 0

DELTA = (-6)^2-(-7*1*4)

DELTA = 64

DELTA > 0

x = (64^(1/2)+6)/(1*2) or x = (6-64^(1/2))/(1*2)

x = 7 or x = -1

(x+1)*(x-7) = 0

(2*x-5)/((x+1)*(x-7))-1/(x-3) < 0

((2*x-5)*(x-3))/((x+1)*(x-7)*(x-3))+(-1*(x+1)*(x-7))/((x+1)*(x-7)*(x-3)) < 0

(2*x-5)*(x-3)-1*(x+1)*(x-7) < 0

x^2-5*x+22 < 0

x^2-5*x+22 = 0

x^2-5*x+22 = 0

DELTA = (-5)^2-(1*4*22)

DELTA = -63

DELTA < 0

1 = 0

1/((x+1)*(x-7)*(x-3)) < 0

1/((x+1)*(x-7)*(x-3)) < 0 // * ((x+1)*(x-7)*(x-3))^2

(x+1)*(x-7)*(x-3) < 0

( x+1 )

x+1 < 0 // - 1

x < -1

( x-3 )

x-3 < 0 // + 3

x < 3

( x-7 )

x-7 < 0 // + 7

x < 7

(-oo:-1) (-1:3) (3:7) (7:+oo) x+1 - + + + x-3 - - + + x-7 - - - +

x in (-oo:-1) U (3:7)

(-oo:-1) U (3:7)

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