The condition that the gradient of one l...

The condition that the gradient of one line is twice the gradient of another line
represented by the equation `ax^(2)+2hxy+by^(2)=0` is

A

(a) `ab=(8h^(2))/9`

B

(b) `ab=h^(2)`

C

(c) `h^(2)+ab=0`

D

(d) `h=a+b`

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The correct Answer is:

A

NA

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