• Best of luck to the class of 2024 for their HSC exams. You got this!
    Let us know your thoughts on the HSC exams here
  • YOU can help the next generation of students in the community!
    Share your trial papers and notes on our Notes & Resources page
MedVision ad

how are these possible (1 Viewer)

mouse

Member
Joined
Feb 15, 2004
Messages
43
help!

how are these possible:

(.4 + .1) / (.4 + .2) = 2 1/3

and

140/1 = .5Y - 10(.1) = 282

they are two seperate problems.

thanks!
 

turtle_2468

Member
Joined
Dec 19, 2002
Messages
408
Location
North Shore, Sydney
Gender
Male
HSC
2002
for the last time.. this is not 4U. please please post it in the extracurricular board
or the commerce board
or the uni board
but not here...
 

KeypadSDM

B4nn3d
Joined
Apr 9, 2003
Messages
2,631
Location
Sydney, Inner West
Gender
Male
HSC
2003
Originally posted by mouse
help!

how are these possible:

(.4 + .1) / (.4 + .2) = 2 1/3

and

140/1 = .5Y - 10(.1) = 282

they are two seperate problems.

thanks!
Sqrt[1] = Sqrt[-1 * -1]
1 = Sqrt[-1] * Sqrt[-1]
1 = i * i
-1 = 1
2 = 0
1 = 0

From there:
.4 = 0, .1 = 0, .2 = 0, 7 = 0, 2 = 0
:.
.4 + .1 - 7 = 0
.4 + .1 = 7
:.
.4 + .2 - 3 = 0
.4 + .2 = 3
:.(.4 + .1) / (.4 + .2) = 7/3
:. (.4 + .1) / (.4 + .2) = 2 1/3

Ask a stupid question ...
 

snoopwogg

Member
Joined
Feb 4, 2004
Messages
74
Location
Guantanamo Bay
Gender
Male
HSC
2004
Sqrt[1] = Sqrt[-1 * -1]
1 = Sqrt[-1] * Sqrt[-1]
1 = i * i
-1 = 1
2 = 0
1 = 0



OK I have a few questions about this
FIRSTLY .. are you implying that maths is WRONG??

SECONDLY... 1 = Sqrt[-1] * Sqrt[-1] (from above)
heres where i think youre wrong...
we know that i*i = -1.. therefore implying that i = +/- sqrt [-1]
so from there...
1 = +/- Sqrt[-1] *+/- Sqrt[-1] Squaring both sides, we get
1 = -1 * -1
1 = 1
... did i do anything wrong here??
 

stupid idiot

New Member
Joined
Jun 11, 2004
Messages
18
Re: Re: how are these possible

Originally posted by KeypadSDM
Sqrt[1] = Sqrt[-1 * -1]
1 = Sqrt[-1] * Sqrt[-1]
1 = i * i
-1 = 1
2 = 0
1 = 0

From there:
.4 = 0, .1 = 0, .2 = 0, 7 = 0, 2 = 0
:.
.4 + .1 - 7 = 0
.4 + .1 = 7
:.
.4 + .2 - 3 = 0
.4 + .2 = 3
:.(.4 + .1) / (.4 + .2) = 7/3
:. (.4 + .1) / (.4 + .2) = 2 1/3

Ask a stupid question ...
How original... thats what i call creativity.
 

Estel

Tutor
Joined
Nov 12, 2003
Messages
1,261
Gender
Male
HSC
2005
I think people aren't taking Keypad's post (which I think was quite funny given the question) very well...
 

Heinz

The Musical Fruit
Joined
Oct 6, 2003
Messages
419
Location
Canberra
Gender
Male
HSC
2004
Originally posted by KeypadSDM
Sqrt[1] = Sqrt[-1 * -1]
1 = Sqrt[-1] * Sqrt[-1]
1 = i * i
-1 = 1
2 = 0
1 = 0
Reminds me of the fortstreet 2003 4u trial.
 

sammeh

Member
Joined
Oct 17, 2003
Messages
85
Location
Mudgee
another of those fun little ideas - like proving that .99999... = 1 by letting using 1/3 = .33333...

in answer to the question you pose in the topic - no. altho keypad already pointed that out.

you cant use maths to make to unequivalent values equal. anyone who tells you otherwise is simply wrong.
 

Affinity

Active Member
Joined
Jun 9, 2003
Messages
2,062
Location
Oslo
Gender
Undisclosed
HSC
2003
Re: Re: how are these possible

mm 0.99999.... and 1.00000000 are both decimal expansions of 1.. nothing's wrong there. (there must be something between 2 different real numbers)

Originally posted by KeypadSDM
Sqrt[1] = Sqrt[-1 * -1]
1 = Sqrt[-1] * Sqrt[-1]
1 = i * i
-1 = 1
2 = 0
1 = 0

From there:
.4 = 0, .1 = 0, .2 = 0, 7 = 0, 2 = 0
:.
.4 + .1 - 7 = 0
.4 + .1 = 7
:.
.4 + .2 - 3 = 0
.4 + .2 = 3
:.(.4 + .1) / (.4 + .2) = 7/3
:. (.4 + .1) / (.4 + .2) = 2 1/3

Ask a stupid question ...
And get a stupid answer :D
 

gman03

Active Member
Joined
Feb 7, 2004
Messages
1,283
Gender
Male
HSC
2003
Ha.. false implies true all the way

Go Discrete
 

McLake

The Perfect Nerd
Joined
Aug 14, 2002
Messages
4,187
Location
The Shire
Gender
Male
HSC
2002
(x+x)(x-x)=x(x-x)
x+x=x

/ by 0 can slip you up easily in algebra ...
 

Slidey

But pieces of what?
Joined
Jun 12, 2004
Messages
6,600
Gender
Male
HSC
2005
Dividing by zero - it makes me feel good.
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top