Question

Ajutor la o proba de evaluare clasa 7:

1)Pentru care valori ale nederminatei X nu are sens raportul algebric:
a)$\frac{2x+3}{3x+2}$
b)$\frac{5x}{x^2-16}$
c)$\frac{5x-2}{2x-3}$
d)$\frac{7x}{x^2-25}$

2)a)Aflati valoarea raportului algebric $\frac{x^2+3}{2x-1}$ pentru:
a)X=3 b)X=√2
2)b)Aflati valoarea raportului algebric$\frac{x^2-2}{3x+1}$ pentru:
a)X=2 b)X=√3

3)a)Amplificati cu X-2 raportul algebric:$\frac{2x}{x+2}$
3)b)Amplificati cu X+3 raportul algebric:$\frac{3x}{x-3}$

4)Simplificati raportul algebric:
a)$\frac{x^2+2x}{x^2-4}$
b)$\frac{x^2-36}{x^2+12x+36}$
c)$\frac{x^2-9}{x^2+3x}$
d)$\frac{x^2-16}{x^2-8x+16}$

5)Efectuati:
a)$\frac{x+1}{x-2} + \frac{3-2x}{5x-10}$
b)$\frac{2x+1}{2x-6} - \frac{x-2}{3x-9}$
c)$\frac{5x-10}{x+1} * \frac{x^2-1}{x^2-4}$
d)$\frac{x^2-9}{y^3-y} / \frac{x^2-6x+9}{4y^2-4}$
e)$\frac{x^2-9}{x^2+3x} + \frac{2x-3}{3-x}$
f)$\frac{2x+1}{2x-4} - \frac{2x-1}{3x-6}$
g)$\frac{9x^2-4}{x^2-1} * \frac{x+1}{6x-4}$
h)$\frac{x^2-x}{y^2-9} / \frac{9x^2-9}{x^2+6x+9}$

6)Scrieti ca putere:
a)$( \frac{4x^2-20x+25}{4x^2-25} )^5*( \frac{2x^3-5x^2}{2x^3+5x^2} )^9 /[( \frac{2x-5}{2x+5} )^2]^8$
b)$( \frac{9x^2+30x+25}{9x^2-25} )^6 *( \frac{3x^2+5x}{3x^2-5x} )^8 /[( \frac{3x-5}{3x+5} )^9]^2$

Raspunsului corect ii dau coronita si 5 stele si primeste 30 de puncte

Answer 1

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