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        Let L1 be a straight linepassing through origin and L2 be a straight line x+y=1. If intercepts made by the circle x^2 + y^2 – x + 3y=0 on L1 and L2 are equal then which of the following equations can represent L1?a)x+y=0      b)y-x=0      c)y+7x=0       d)x-7y=0
one year ago

Arun
22984 Points
							whose roots arem=1,-1/7so possible values of L1 arex=y andx = -7ysquaring and simplifying we get the quadratic asIt’s simpleLets say L1 is y=mxThen as chords are equal the perpendicular distance from the center of the circle should also be samecenter is(1/2,-3/2)so we have (by equating the perpendicular distance from center to L1 and L2)  RegardsArun

one year ago
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### Course Features

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### Course Features

• 110 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions