Question

Tìm tập xác địh của các hàm sô sau :

a) y= \(\dfrac{x-1}{x+2}\)

b) y= \(\dfrac{x-1}{x2-3x-4}\)

c)y= \(\dfrac{2x}{x2+x+1}\)
d) y= \(\sqrt{2x-4}\)

e) y= \(\sqrt{5-6x}\)

f) y= \(\sqrt{\dfrac{x+1}{x-2}}\)

g) y= \(\sqrt{x-1}\) + \(\sqrt{3-x}\)

h) y=\(\dfrac{3}{\sqrt{x-5}}\)

i) y= \(\sqrt{x-1}\) + \(\sqrt{2x-1}\)

k) y= \(\sqrt{2-x}\) + \(\sqrt{3-x}\)

l) y= \(\dfrac{2}{\left|x\right|-3}\)

m) y= \(\dfrac{3x}{x-3}\)+ \(\sqrt{x+2}\)

Answer 1

a. R / \(\left\{-2\right\}\)

b. R / \(\left\{4;-1\right\}\)

c. R ( mẫu luôn > 0 )

d. \(\left(2;+\infty\right)\)

Answer 2

e. \(\left(-\infty;\dfrac{5}{6}\right)\)

f. \(\left(2;+\infty\right)\)

g. \(\left(1;3\right)\)

h. \(\left(5;+\infty\right)\)

i. \(\left(1;+\infty\right)\)

k. \(\left(-\infty;2\right)\)

l. R/\(\left\{\pm3\right\}\)

m. \(\left(-2;+\infty\right)/\left\{3\right\}\)

Answer 3

Giúp mình với mình tick cho !