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Question Number 17653 by 1kanika# last updated on 09/Jul/17
A line segment moves in the plane  with its end points on the coordinate  axes so that the sum of the length  of its intersect on the coordinate   axes is a constant C .  Find the locus of the mid points of  this segment .  Ans. is   8(∣x∣^3 +∣y∣^3 )=C .  Λ  means power . pls. solve it.
AlinesegmentmovesintheplanewithitsendpointsonthecoordinateaxessothatthesumofthelengthofitsintersectonthecoordinateaxesisaconstantC.Findthelocusofthemidpointsofthissegment.Ans.is8(x3+y3)=C.Λmeanspower.pls.solveit.
Commented by mrW1 last updated on 09/Jul/17
the locus should be a straight line:  x+y=(C/2)
thelocusshouldbeastraightline:x+y=C2
Commented by mrW1 last updated on 09/Jul/17
let us say intersection at y−axis is  (0,b) and intersection at x−axis is  (a,0)  a+b=constant=C  mid point of seqment is (x,y)  x=((0+a)/2)  y=((0+b)/2)  ⇒x+y=((a+b)/2)=(C/2)
letussayintersectionatyaxisis(0,b)andintersectionatxaxisis(a,0)a+b=constant=Cmidpointofseqmentis(x,y)x=0+a2y=0+b2x+y=a+b2=C2
Commented by 1kanika# last updated on 09/Jul/17
but the answer is  8(∣x∣Λ3+∣y∣Λ3)=C
buttheansweris8(xΛ3+yΛ3)=C
Commented by 1kanika# last updated on 09/Jul/17
where  Λ means power
whereΛmeanspower
Commented by 1kanika# last updated on 09/Jul/17
Locus of mid points is not a straight  line as the line segment is moves all  around of plane.
Locusofmidpointsisnotastraightlineasthelinesegmentismovesallaroundofplane.
Commented by mrW1 last updated on 10/Jul/17
then please post a picture to show  what your question means.
thenpleasepostapicturetoshowwhatyourquestionmeans.

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