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In a GP, first term is 1. If 4T(2) + 5T(...

In a GP, first term is 1. If `4T_(2) + 5T_(3)` is minimum, then its common ratio is

A

`(2)/(5)`

B

`-(2)/(5)`

C

`(3)/(5)`

D

`-(3)/(5)`

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • If the first term of a G.P. a_(1),a_(2),a_(3) is unity such that 4a_(2)+5a_(3) is least, then the common ratio of the G.P. is

    A
    `2/5`
    B
    `-2/5`
    C
    `-3/5`
    D
    `-1/5`

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    A
    1−5–√2
    B
    √+12
    C
    9
    D
    None of these

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