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The line lx+my+n=0 meets the hyperbola x 2 /a 2 -y 2 =1 at the extremeties of apair of conjugate diameters,then a 2 l 2 -b 2 m 2 is a. 0 b. 1 c. -1 d none

The line lx+my+n=0 meets the hyperbola x2/a2-y2=1 at the extremeties of apair of conjugate diameters,then  al2-b2m2 is


a. 0


b. 1


c. -1


d none

Grade:12

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