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प्रश्न
Choose the correct alternative.
byx = ______
विकल्प
`"r" sigma_"x"/sigma_"y"`
`"r" sigma_"y"/sigma_"x"`
`1/"r" sigma_"y"/sigma_"x"`
`1/"r" sigma_"x"/sigma_"y"`
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उत्तर
byx = `underline ("r" sigma_"y"/sigma_"x")`
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