Prosze o rozwiązanie zadań z załącznika i rozpisanie oraz wyjaśnie dam naj za najszybsze rozwiązanie
Zad1 skroć ułamki funkcje wymierne:
a)(x^3-x)/(1-x)
b)(x^2-14x+49)/(49-x^2)
c)(x^3-3x^2-9x+27)/(x^2-6x+9)
d)(36+3x-3x^2)/(x^2+6x+9)
e)(-2x^2-14x+16)/(3x^2+15x-72)
f)(2x^2-4x)/(2-x)
Zad2 Rozszerz ulamki funkcje wymierne:
a)(x+2)/(x^2-x)=(......)/(x^3-x)
b)2/3x^4=(.....)/(6x^8)
c)4/(15x^3)=(......)/(30x^7)
d)3/5x=(3x^2)/(......)
e)(9-x)/3=(81-x^2)/(....)
f)(2x+3)/(x-5)=(4x^2+12x+9)/(......)
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Zad 1
a) (x^3-x)/(1-x) = x(x^2-1)/(1-x)= -x(1-x^2)/(1-x)= -x(1-x)(1+x)/(1-x)= -x(x+1)
b)(x^2-14x+49)/(49-x^2) = (x-7)^2/-(x^2-49) = (x-7)^2/-(x-7)(x+7)= -(x-7)/(x+7)
c) (x^3-3x^2-9x+27)/(x^2-6x+9)= [x^2(x-3) -9(x-3)]/(x-3)^2= (x-3)^2*(x+3)/(x-3)^2= x+3
d) (36+3x-3x^2)/(x^2+6x+9)=-3(x^2-x-12)/(x+3)^2= -3(x+3)(x-4)/(x+3)^2= -3(x-4)/(x+3)
e) (-2x^2-14x+16)/(3x^2+15x-72)= -2(x^2+7x-8)/3(x^2+5x-24)=-2(x+8)(x-1)/3(x+8)(x-3)= -2(x-1)/3(x-3)
f) f)(2x^2-4x)/(2-x) =2x(x-2)/(2-x)=-2x(2-x)/(2-x)=-2x
zad 2
a)(x+2)/(x^2-x)=(......)/(x^3-x) = (x+2)/x(x-1) = (x+2)(x+1)/x(x-1)(x+1) = x^2+3x+2/ x^3 -x
b) 2/3x^4=(.....)/(6x^8)= 2 * 2x^4/ 3x^4*2x^4 = 4x^4/6x^4
c)4/(15x^3)=(......)/(30x^7) = 4*2x^4/15x^3*2x^4= 8x^4/30x^7
d)3/5x=(3x^2)/(......) = 3 * x^2/5x*x^2 = 3x^2/ 5x^3
e)(9-x)/3=(81-x^2)/(....) = (9-x)(9+x)/3(9+x)= (81-x^2)/ 27+3x
f)(2x+3)/(x-5)=(4x^2+12x+9)/(......) = (2x+3)(2x+3)/(x-5)(2x+3)=(4x^2+12x+9)(2x^2-7x-15)