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If the line ax+by+c=0 is normal to the x...

If the line `ax+by+c=0` is normal to the `xy+5=0`, then a and b have

A

same sign

B

opposite sign

C

cannot be discussed

D

None of these

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • If the line ax+by+c=0 is normal to the curve xy+5=0 , then

    A
    `a gt0, b gt0`
    B
    `b gt 0, a lt 0`
    C
    `blt0, a gt0`
    D
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    A
    `a gt 0, b gt 0`
    B
    `a gt 0, b lt 0`
    C
    `a gt 0, b lt 0`
    D
    `a lt 0, b lt 0`

  • If the line ax+by+c=0 is normal to xy=1 , then

    A
    `agt0,bgt0`
    B
    `agt0,blt0`
    C
    `bgt0,alt0`
    D
    `alt0,blt0`

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