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Category: Coordinate Geometry

can-the-directrix-of-a-parabola-be-in-the-form-y-mx-b-or-is-there-an-inclined-parabola-with-directrix-and-axis-of-symmetry-in-the-form-of-y-mx-b-

Question Number 48121 by JDlix last updated on 19/Nov/18 $${can}\:{the}\:{directrix}\:{of}\:{a}\:{parabola}\:{be}\:{in}\:{the}\:{form}\:{y}={mx}+{b}\:\:? \\ $$$${or}\:{is}\:{there}\:{an}\:{inclined}\:{parabola}\:{with}\:{directrix}\:{and}\:{axis}\: \\ $$$${of}\:{symmetry}\:{in}\:{the}\:{form}\:{of}\:{y}={mx}+{b}\:\:?? \\ $$ Commented by MJS last updated on 19/Nov/18 $$\mathrm{you}\:\mathrm{can}\:\mathrm{rotate}\:\mathrm{a}\:\mathrm{parabola},\:\mathrm{so}\:\mathrm{this}\:\mathrm{is}\:\mathrm{indeed} \\…

Question-113644

Question Number 113644 by AbhishekBasnet last updated on 14/Sep/20 Answered by 1549442205PVT last updated on 14/Sep/20 $$\mathrm{The}\:\mathrm{intersection}\:\mathrm{point}\:\mathrm{of}\:\mathrm{two}\:\mathrm{lines} \\ $$$$\mathrm{x}−\mathrm{y}+\mathrm{1}=\mathrm{0}\:\mathrm{and}\:\mathrm{2x}−\mathrm{y}−\mathrm{1}=\mathrm{0}\:\mathrm{is}\:\mathrm{roots} \\ $$$$\mathrm{of}\:\mathrm{the}\:\mathrm{system}:\begin{cases}{\mathrm{x}−\mathrm{y}+\mathrm{1}=\mathrm{0}}\\{\mathrm{2x}−\mathrm{y}−\mathrm{1}=\mathrm{0}}\end{cases} \\ $$$$\mathrm{Substracting}\:\mathrm{two}\:\:\mathrm{above}\:\mathrm{equations} \\ $$$$\mathrm{we}\:\mathrm{get}\:\mathrm{x}−\mathrm{2}=\mathrm{0}\Rightarrow\mathrm{x}=\mathrm{2},\mathrm{y}=\mathrm{3}.\mathrm{Replace}\:…

Question-178833

Question Number 178833 by Spillover last updated on 22/Oct/22 Answered by cortano1 last updated on 22/Oct/22 $$\left(\mathrm{b}\right)\:\mathrm{L}_{\mathrm{3}} \equiv\:\mathrm{L}_{\mathrm{2}} +\mathrm{k}\left(\mathrm{L}_{\mathrm{1}} −\mathrm{L}_{\mathrm{2}} \right)=\mathrm{0} \\ $$$$\Rightarrow\mathrm{x}^{\mathrm{2}} +\mathrm{y}^{\mathrm{2}} −\mathrm{10x}−\mathrm{12y}+\mathrm{40}+\mathrm{k}\left(\mathrm{8x}+\mathrm{8y}−\mathrm{44}\right)=\mathrm{0}…

Find-locus-of-point-P-from-which-tangents-PA-amp-PB-to-circles-x-2-y-2-a-2-and-x-2-y-2-b-2-respectively-are-perpendicular-

Question Number 47621 by rahul 19 last updated on 12/Nov/18 $${Find}\:{locus}\:{of}\:{point}\:{P}\:{from}\:{which} \\ $$$${tangents}\:{PA}\:\&\:{PB}\:{to}\:{circles}\:{x}^{\mathrm{2}} +{y}^{\mathrm{2}} ={a}^{\mathrm{2}} \\ $$$${and}\:{x}^{\mathrm{2}} +{y}^{\mathrm{2}} ={b}^{\mathrm{2}} \:{respectively}\:{are}\:{perpendicular}. \\ $$ Commented by rahul…

Question-178647

Question Number 178647 by infinityaction last updated on 19/Oct/22 Answered by mr W last updated on 19/Oct/22 $${side}\:{length}\:={x} \\ $$$$\frac{{x}}{\mathrm{5}}=\frac{\mathrm{5}+\mathrm{1}}{{x}+\sqrt{\mathrm{5}^{\mathrm{2}} −{x}^{\mathrm{2}} }} \\ $$$${x}\sqrt{\mathrm{25}−{x}^{\mathrm{2}} }=\mathrm{30}−{x}^{\mathrm{2}}…