Maths thread (1 Viewer)

[si2136]

It's probably Year 12 level haha.

Confirm answer please!

Working Out: http://i.imgur.com/KZa0CcW.jpg http://i.imgur.com/BU3vSr3.jpg

Roots = -0.7341245814220796, 0.2981456008918486(+-)0.9545204034848249i, -1.3621666203616176

 

[leehuan]

How is that question Year 11? It contains complex numbers.

Nah it can still Yr 11 actually. You reject all those complex solutions cause you don't know what the square root of a negative is.

Just stupid for day 2

 

[leehuan]

Confirm answer please!

Working Out: http://i.imgur.com/KZa0CcW.jpg http://i.imgur.com/BU3vSr3.jpg

Roots = -0.7341245814220796, 0.2981456008918486(+-)0.9545204034848249i, -1.3621666203616176

Use WolframAlpha

 

[KingOfActing]

Confirm answer please!

Working Out: http://i.imgur.com/KZa0CcW.jpg http://i.imgur.com/BU3vSr3.jpg

Roots = -0.7341245814220796, 0.2981456008918486(+-)0.9545204034848249i, -1.3621666203616176

Can't be right since the answers should all be surds. Don't ever use decimals unless you absolutely have to. Also in an exam you'd have to prove that solving that resultant cubic with the substitutions you made actually solves the quartic (though, in an exam, you're not gonna get a quartic that needs the resultant cubic method of solving).

 

[Green Yoda]

Ayyyy cambridge bud

Actually fitzpatrick

 

[si2136]

Actually fitzpatrick

Terry Lee

 

[leehuan]

Cambridge is the norm for maths at the 2U and 3U level.

Fitzpatrick, provided you use the new version, is still a healthy substitute. But it's not as good with it's content.

Terry Lee is for at minimal high band 4 students

 

[Green Yoda]

Cambridge is the norm for maths at the 2U and 3U level.

Fitzpatrick, provided you use the new version, is still a healthy substitute. But it's not as good with it's content.

Terry Lee is for at minimal high band 4 students

will use Cambridge when a harder topic comes up, right now im just using my school textbook (fitzpatrick)

 

[Paradoxica]

Cambridge is the norm for maths at the 2U and 3U level.

Fitzpatrick, provided you use the new version, is still a healthy substitute. But it's not as good with it's content.

Terry Lee is for at minimal high band 4 students

Really? Because none of the integration questions impress me.

 

[leehuan]

Really? Because none of the integration questions impress me.

Was any of the HSC integration questions meant to be impressive in 2/3u?

 

[Paradoxica]

Was any of the HSC integration questions meant to be impressive in 2/3u?

Oh, I thought we were talking about 4U

In the case of 3/2, the answer is even more obvious.