A. Determine whether a given expression is a national function. rational equation or rational inequality.
1.
[tex]7 < \frac{4}{x - 4} [/tex]
2.
[tex] \frac{2x}{5 } + \frac{3}{10} = \frac{1}{2} [/tex]
3. f
[tex]f(x) = \frac{1}{x + 5} [/tex]
4.
[tex] \frac{x + 7}{x - 4} \geqslant 0[/tex]
1.
[tex]7 < \frac{4}{x - 4} [/tex]
2.
[tex] \frac{2x}{5 } + \frac{3}{10} = \frac{1}{2} [/tex]
3. f
[tex]f(x) = \frac{1}{x + 5} [/tex]
4.
[tex] \frac{x + 7}{x - 4} \geqslant 0[/tex]
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Answer:
1.4×<×<32/7
2.×=0.5
3.×<-7 or ×>4