#看不懂答案

27 messages · Page 1 of 1 (latest)

exotic micaBOT
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dire ruin
runic cloud
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I'm sure you undestand that not many people here speak that language, so it would be nice if you provided a translation.

dire ruin
dire ruin
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in the plane corrdinate system xOy, l_1:y=2x, l_2:y=-2x, there exists a moving point P, draw a line through P DP//l_2 and intersects l_1 at point D, EP//l_1 intersecting l_2 at point E, the area of ODPE is equal to 1
(1) Find the trajectory function of point P
ans: y^2/4-x^2=1 or x^2-y^2/4=1

(2) Let the trajectory function of point P be the function C (C is the function notation for the point P), set G(3/4,0), when point P is at the right side of the y axis, and does not fall on the x axis, on the right side of the y axis on the function C a point P satiesfies angle <PGQ is divided into two parts by the x axis, PQ is not perpendicular to the x axis or PG is tangent to C, find the minimum area of the triangle that PQ, l_1, l_2 envelops

i have trouble understanding the solution provided above for question number two
mainly the fect that <PGQ can be divided into two parts by the x axis while Q and P are not reflected about the x axis and everything that follows that part

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@runic cloud

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if you need a translation for the ans i can also provide one

runic cloud
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Well, I think I get the idea of this exercise, but this might be a little too hard for me. Well, I'm sure someone else can help!

dire ruin
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thanks,

hollow bronze
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Ngl i thought this was a troll like the question

dire ruin
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you can find the solution on 作业帮

hollow bronze
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Lol

dire ruin
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you mean you saw the thumnail lol

hollow bronze
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Stuff

dire ruin
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it s okay lol i get it

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how far is geometry 1

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like what topics does it cover

hollow bronze
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Circle equation

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Arc

dire ruin
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cool

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this problem covers analytic geometry basically conic sections like the hyperbola seen in the thumbnail

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for this problem the solution gets more confusing as you continue reading