1.

If the intercepts made by tangent, normal to a rectangular hyperbola x^(2)-y^(2)=a^(2) with x-axis are a_(1),a_(2) and with y-axis are b_(1)b_(2) when a_(1)a_(2)+b_(1)b_(2)=

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0
1
`-1`
`a^2`

ANSWER :A


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