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c. x 1 2x 2 1 3x 3 1
d. 4x – 5 y 2x xy
x
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Tìm :x
a. 2 1– x –1x 2 x 2 x 3 4 2 b. 23 x 3 x 2 – 2 3 – 4x –1x 80
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c. 2x –1x x 1 3x x 1 d. 1– 2x x 2 – 2x x 3 – 3x x 2
2
0
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