Login

Search the forums now!

Welcome, Guest. Please login or register.

June 12, 2024, 12:10:31 am
Pages: [1]   Go Down

Author Topic: Clarification for a "show that"  (Read 905 times)  Share 

0 Members and 1 Guest are viewing this topic.

Martoman

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1476
  • Respect: +11
Clarification for a "show that"
« on: April 23, 2010, 11:57:41 pm »
0
If a question has a show that in it is it sufficient to show either LHS=RHS OR RHS=LHS?

Like show that

So instead of shoing LHS = RHS, I show RHS = LHS:





But this is too easy?? :)
Logged
2009: Math methods: 50, Psychology: 44
2010: chem 47, further 48, Spesh 49 fml seriously and other yr 11 subs.
2011: Holidaying, screw school.
No. Not azn.
___________________________________
Swedish meal time all the time

m@tty

  • Victorian
  • ATAR Notes Legend
  • *******
  • Posts: 4324
  • Respect: +33
  • School: Heatherton Christian College
  • School Grad Year: 2010
Re: Clarification for a "show that"
« Reply #1 on: April 24, 2010, 12:06:51 am »
0
Wow, that question is easy. From what I understand there is no problem showing RHS=LHS. Haha, you should probably show one more step, well at least I would in an exam...
Logged
2009/2010: Mathematical Methods(non-CAS) ; Business Management | English ; Literature - Physics ; Chemistry - Specialist Mathematics ; MUEP Maths

96.85

2011-2015: Bachelor of Aerospace Engineering and Bachelor of Science, Monash University

2015-____: To infinity and beyond.

Martoman

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1476
  • Respect: +11
Re: Clarification for a "show that"
« Reply #2 on: April 24, 2010, 12:08:51 am »
0
Wow. That is amazingly fail. How do you go the other way tho?
Logged
2009: Math methods: 50, Psychology: 44
2010: chem 47, further 48, Spesh 49 fml seriously and other yr 11 subs.
2011: Holidaying, screw school.
No. Not azn.
___________________________________
Swedish meal time all the time

Cthulhu

  • Guest
Re: Clarification for a "show that"
« Reply #3 on: April 24, 2010, 12:14:28 am »
0
Thats how show that questions work... manipulate one side to get the other or plugging and chugging.
like:
Show that is a solution of
You would simply show that
and so
Logged

m@tty

  • Victorian
  • ATAR Notes Legend
  • *******
  • Posts: 4324
  • Respect: +33
  • School: Heatherton Christian College
  • School Grad Year: 2010
Re: Clarification for a "show that"
« Reply #4 on: April 24, 2010, 12:17:02 am »
0




Nothing else I can think of doing...

In general it's easier to take the side with more terms and try and express it as a single term, rather than splitting one up..

If a question says: "Prove 1= some big expression" would you take the one?...
« Last Edit: April 24, 2010, 12:18:41 am by m@tty »
Logged
2009/2010: Mathematical Methods(non-CAS) ; Business Management | English ; Literature - Physics ; Chemistry - Specialist Mathematics ; MUEP Maths

96.85

2011-2015: Bachelor of Aerospace Engineering and Bachelor of Science, Monash University

2015-____: To infinity and beyond.

Martoman

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1476
  • Respect: +11
Re: Clarification for a "show that"
« Reply #5 on: April 24, 2010, 12:25:42 am »
0
mmm see I did this creatively adding zero trick, but i thought it was "cheating" in a way to make the jump to just say 1/2 of 2x+2. Silly me. I thought that you had to individually get to that point... some..how....  :-\
Logged
2009: Math methods: 50, Psychology: 44
2010: chem 47, further 48, Spesh 49 fml seriously and other yr 11 subs.
2011: Holidaying, screw school.
No. Not azn.
___________________________________
Swedish meal time all the time

m@tty

  • Victorian
  • ATAR Notes Legend
  • *******
  • Posts: 4324
  • Respect: +33
  • School: Heatherton Christian College
  • School Grad Year: 2010
Re: Clarification for a "show that"
« Reply #6 on: April 24, 2010, 12:34:31 am »
0
What is your 'adding zero trick' ?
Logged
2009/2010: Mathematical Methods(non-CAS) ; Business Management | English ; Literature - Physics ; Chemistry - Specialist Mathematics ; MUEP Maths

96.85

2011-2015: Bachelor of Aerospace Engineering and Bachelor of Science, Monash University

2015-____: To infinity and beyond.

Martoman

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1476
  • Respect: +11
Re: Clarification for a "show that"
« Reply #7 on: April 24, 2010, 12:37:25 am »
0
Like when you did to enable seperation, and in most cases, quick division.
Logged
2009: Math methods: 50, Psychology: 44
2010: chem 47, further 48, Spesh 49 fml seriously and other yr 11 subs.
2011: Holidaying, screw school.
No. Not azn.
___________________________________
Swedish meal time all the time

m@tty

  • Victorian
  • ATAR Notes Legend
  • *******
  • Posts: 4324
  • Respect: +33
  • School: Heatherton Christian College
  • School Grad Year: 2010
Re: Clarification for a "show that"
« Reply #8 on: April 24, 2010, 12:44:39 am »
0
Oh yeah, I thought it was some cool new trick :P No matter.
Logged
2009/2010: Mathematical Methods(non-CAS) ; Business Management | English ; Literature - Physics ; Chemistry - Specialist Mathematics ; MUEP Maths

96.85

2011-2015: Bachelor of Aerospace Engineering and Bachelor of Science, Monash University

2015-____: To infinity and beyond.

GerrySly

  • Victorian
  • Forum Leader
  • ****
  • Posts: 790
  • Respect: +5
Re: Clarification for a "show that"
« Reply #9 on: April 24, 2010, 09:57:33 am »
0
It's best to just look at the marks, if it requires 2+ marks it's best to do m@tty's otherwise your way is fine.
Logged
VCE 2009
English, Methods, Specialist, IT: Software Development, Religion & Society, French

Martoman

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1476
  • Respect: +11
Re: Clarification for a "show that"
« Reply #10 on: April 24, 2010, 01:41:45 pm »
0
I was thinking along similar lines, thanks guys for the feedback!
Logged
2009: Math methods: 50, Psychology: 44
2010: chem 47, further 48, Spesh 49 fml seriously and other yr 11 subs.
2011: Holidaying, screw school.
No. Not azn.
___________________________________
Swedish meal time all the time
Pages: [1]   Go Up