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प्रश्न
Choose the correct alternative:
The sum up to n terms of the series `1/(sqrt(1) +sqrt(3)) + 1/(sqrt(3) + sqrt(5)) + 1/(sqrt(5) + sqrt(7)) + ...` is
विकल्प
`sqrt(2"n" + 1)`
`sqrt(2"n" + 1)/2`
`sqrt(2"n" + 1) - 1`
`(sqrt(2"n" + 1) - 1)/2`
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उत्तर
`(sqrt(2"n" + 1) - 1)/2`
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