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यदि रेखा lx + my + n = 0 वृत्त: x^2 + y...

यदि रेखा `lx + my + n = 0` वृत्त: `x^2 + y^2 = alpha^2` की एक स्पर्श रेखा है, तो

A

`n^2(l^2 + m^2) = a^2`

B

`a^2 (l^2 + m^2) = n^2`

C

`n (1 + m) = a`

D

`a (1 + m ) = n`

लिखित उत्तर

Verified by Experts

The correct Answer is:
B
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