Qn. (1 Viewer)

[chousta]

hi.

 

[chousta]

ey just solved the 2nd one. bt just drew it out and got the answer from there. Is that ok??


i. 5+3i
ii. Major axis=10
Minor axis=6
iii.0less than or equal to arg (z) less than or equal to 90

 

[LoneShadow]

Use implicit differentiation in the first one:

u^2 = 4-x^2 => 2u*du/dx = -2x =>-udu = xdx. then the Integral = Integral[(u^4-4u^2)du] integrated from 2 to 0. It gives 64/15.

 

[pLuvia]

ey just solved the 2nd one. bt just drew it out and got the answer from there. Is that ok??


i. 5+3i
ii. Major axis=10
Minor axis=6
iii.0less than or equal to arg (z) less than or equal to 90

You can do this algebraically or graphically, and for sure the graphical method is much more efficient and a time saver

Beats me why I did it algebraically in the 4u HSC exam

 

[haque]

For the ellipse use PS+PS'=2a property-from that u find a and from that u can find e. So the complex numbers with the zs are the coords of the foci of the ellipse- except the ellipse has just been shifted up. U can find b easily from this. U have the ability to do this chousta-draw diagrams as well

 

[LoneShadow]

pLuvia: love your avatar. where did u get it from?

 

[chousta]

For the ellipse use PS+PS'=2a property-from that u find a and from that u can find e. So the complex numbers with the zs are the coords of the foci of the ellipse- except the ellipse has just been shifted up. U can find b easily from this. U have the ability to do this chousta-draw diagrams as well

THANKS HAQUE

Are you excited for uni??? is o week comin to an end?:wave:

 

[pLuvia]

pLuvia: love your avatar. where did u get it from?

One of the Naruto forums I think it was from narutofan.com