Giải các phương trình và bất phương trình dưới đây:
a) 2x – 7 = 5x + 20 b) x3 – 4x = 0
\(c) \ \frac{1}{2 \text{x}-3}- \frac{3}{2{{ \text{x}}^{2}}-3 \text{x}}= \frac{5}{x} \) \(d) \ \frac{2 \text{x}-2}{3}>2- \frac{x+2}{2} \)
A.a) \(S=\left\{ -9 \right\}.\) b) \(S=\left\{ -2;\ 0;\ 2 \right\}\)
c) \(S=\left\{ \frac{4}{3} \right\}\) d) \(S=\left\{ x\in R\ |x>\frac{10}{7} \right\}.\)
B.a) \(S=\left\{ -9 \right\}.\) b) \(S=\left\{ -2;\ 1;\ 2 \right\}\)
c) \(S=\left\{ \frac{1}{3} \right\}\) d) \(S=\left\{ x\in R\ |x>\frac{10}{7} \right\}.\)
C.a) \(S=\left\{ -8 \right\}.\) b) \(S=\left\{ -2;\ 0;\ 4 \right\}\)
c) \(S=\left\{ \frac{4}{3} \right\}\) d) \(S=\left\{ x\in R\ |x>\frac{1}{7} \right\}.\)
D.a) \(S=\left\{ -6 \right\}.\) b) \(S=\left\{ -1;\ 0;\ 2 \right\}\)
c) \(S=\left\{ \frac{4}{5} \right\}\) d) \(S=\left\{ x\in R\ |x>\frac{10}{7} \right\}.\)
a) 2x – 7 = 5x + 20 b) x3 – 4x = 0
\(c) \ \frac{1}{2 \text{x}-3}- \frac{3}{2{{ \text{x}}^{2}}-3 \text{x}}= \frac{5}{x} \) \(d) \ \frac{2 \text{x}-2}{3}>2- \frac{x+2}{2} \)
A.a) \(S=\left\{ -9 \right\}.\) b) \(S=\left\{ -2;\ 0;\ 2 \right\}\)
c) \(S=\left\{ \frac{4}{3} \right\}\) d) \(S=\left\{ x\in R\ |x>\frac{10}{7} \right\}.\)
B.a) \(S=\left\{ -9 \right\}.\) b) \(S=\left\{ -2;\ 1;\ 2 \right\}\)
c) \(S=\left\{ \frac{1}{3} \right\}\) d) \(S=\left\{ x\in R\ |x>\frac{10}{7} \right\}.\)
C.a) \(S=\left\{ -8 \right\}.\) b) \(S=\left\{ -2;\ 0;\ 4 \right\}\)
c) \(S=\left\{ \frac{4}{3} \right\}\) d) \(S=\left\{ x\in R\ |x>\frac{1}{7} \right\}.\)
D.a) \(S=\left\{ -6 \right\}.\) b) \(S=\left\{ -1;\ 0;\ 2 \right\}\)
c) \(S=\left\{ \frac{4}{5} \right\}\) d) \(S=\left\{ x\in R\ |x>\frac{10}{7} \right\}.\)
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