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(1)/(2 xx 5) + (1)/(5 xx 8) + (1)/(8 xx ...

`(1)/(2 xx 5) + (1)/(5 xx 8) + (1)/(8 xx 11) + ...... + (1)/(23 xx 26) = ?`

A

`(1)/(11)`

B

`(3)/(11)`

C

`(2)/(13)`

D

`(4)/(13)`

लिखित उत्तर

Verified by Experts

The correct Answer is:
C
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  3. (1)/(2 xx 5) + (1)/(5 xx 8) + (1)/(8 xx 11) + ...... + (1)/(23 xx 26) ...

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  4. (3)/(1^(2) xx 2^(2)) + (5)/(2^(2) xx 3^(2)) + (7)/(3^(2) xx 4^(2)) + ....

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  5. (5)/(2^(2) xx 3^(2)) + (7)/(3^(2) xx 4^(2)) + (9)/(4^(2) xx 5^(2)) + ....

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  6. (1 + (1)/(2))(1 + (1)/(3))+(1 + (1)/(4))(1 + (1)/(5))....(1 + (1)/(x))...

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  7. (1 + (1)/(2))(1 + (1)/(3))(1 + (1)/(4))(1 + (1)/(5))......(1+ (1)/(29)...

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  9. (1-(1)/(2))(1-(1)/(3))(1-(1)/(4))....(1-(1)/(19)) = ?

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  10. (1-(1)/(5))(1-(1)/(6))(1-(1)/(7))....(1-(1)/(39)) = ?

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  11. यदि x+(1)/(x) =1 है, तो x^(3) का मान ज्ञात कीजिए।

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  12. (1 - (1)/(2^(2))) (1 - (1)/(3^(2)))(1 - (1)/(4^(2)))....(1 - (1)/(90^(...

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  13. (1)/(1 + (1)/(1 + (1)/(1+(1)/(1 + (1)/(2))))) का मान ज्ञात कीजिए |

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  14. 1 + (1)/(1 + (1)/(1 + (1)/(1 + (2)/(3)))) का मान ज्ञात कीजिए |

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  15. 2 + (1)/(2 + (1)/(2 + (1)/(2 + (1)/(3)))) का मान ज्ञात कीजिए |

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  16. 3 + (2)/(3 + (2)/(3 + (2)/(3 + (2)/(3)))) का मान ज्ञात कीजिए |

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  17. 3 + (5)/(4 + (6)/(3 + (2)/(2 + (3)/(5)))) का मान ज्ञात कीजिए |

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  18. यदि (3)/(2 + (2)/(2 + (2)/(2 + (2)/(3)))) = x है, तो x का मान ज्ञात की...

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  19. 1 + (1)/(1 + (1)/(1 + (1)/(1 + (1)/(x)))) का मान ज्ञात कीजिए |

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  20. 1 - (1)/(1 - (1)/(1 - (1)/(1 - (1)/(x)))) का मान ज्ञात कीजिए |

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