Kerjain yg bagian b,c,d,e yah
a
[tex] \frac{x + 1}{x {}^{2}y } - \frac{y + 2}{xy {}^{2} } = \frac{xy + y}{x {}^{2} y {}^{2} } - \frac{xy + 2x}{x {}^{2} y {}^{2} } = \frac{ - 2x + y}{x {}^{2}y {}^{2} } \\ [/tex]
b
[tex] \frac{3}{x {}^{3}y } + \frac{5}{xy {}^{3} } = \frac{3y {}^{2} }{x {}^{3} y {}^{3} } + \frac{5x {}^{2} }{x {}^{3} y {}^{3} } = \frac{5x {}^{2} + 3y {}^{2} }{x {}^{3}y {}^{3} } \\ [/tex]
c
[tex] \frac{7}{x {}^{2}y {}^{2} } - \frac{9}{x {}^{3}y } = \frac{7x - 9y}{x {}^{3} y {}^{2} } \\ [/tex]
d
[tex] \frac{1}{xyz} - \frac{1}{x {}^{2}y } = \frac{x - z}{x {}^{2} yz} \\ [/tex]
e
[tex] \frac{a}{b} + \frac{b}{c} + \frac{c}{a} = \frac{a {}^{2}c + ab {}^{2} + bc {}^{2} }{abc} \\ [/tex]
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