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GMAT Club 12 Days of Christmas is a 4th Annual GMAT Club Winter Competition based on solving questions. This is the Winter GMAT competition on GMAT Club with an amazing opportunity to win over $40,000 worth of prizes!
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MvArrow
Joined: 06 Sep 2016
Last visit: 26 Jan 2019
Posts: 107
Own Kudos:
Given Kudos: 100
Location: Italy
Schools: EDHEC (A$)
GMAT 1: 650 Q43 V37
GPA: 3.2
WE:General Management (Human Resources)
12 May 2017, 06:36
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Hello everyone:
I would like to ask a small (and maybe stupid) question:
Are there any differences between writing |a| = |b| and |a| = b ?
Or in both cases it's A = B or A = -B ?
Thanks a LOT
I would like to ask a small (and maybe stupid) question:
Are there any differences between writing |a| = |b| and |a| = b ?
Or in both cases it's A = B or A = -B ?
Thanks a LOT
12 May 2017, 07:01
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MvArrow
Hello everyone:
I would like to ask a small (and maybe stupid) question:
Are there any differences between writing |a| = |b| and |a| = b ?
Or in both cases it's A = B or A = -B ?
Thanks a LOT
I would like to ask a small (and maybe stupid) question:
Are there any differences between writing |a| = |b| and |a| = b ?
Or in both cases it's A = B or A = -B ?
Thanks a LOT
Hi MvArrow ,
No, if we are saying |A|= |B| we cannot say |A| = B, because it may happen that b is -ve. In that case, |a| will become -ve but this is against the modulus rules.
So, |A| = B is correct only when we are given that B is positive.
Let me know in case of more doubts.
MvArrow
Joined: 06 Sep 2016
Last visit: 26 Jan 2019
Posts: 107
Own Kudos:
Given Kudos: 100
Location: Italy
Schools: EDHEC (A$)
GMAT 1: 650 Q43 V37
GPA: 3.2
WE:General Management (Human Resources)
12 May 2017, 07:24
Kudos
Bookmarks
abhimahna
MvArrow
Hello everyone:
I would like to ask a small (and maybe stupid) question:
Are there any differences between writing |a| = |b| and |a| = b ?
Or in both cases it's A = B or A = -B ?
Thanks a LOT
I would like to ask a small (and maybe stupid) question:
Are there any differences between writing |a| = |b| and |a| = b ?
Or in both cases it's A = B or A = -B ?
Thanks a LOT
Hi MvArrow ,
No, if we are saying |A|= |B| we cannot say |A| = B, because it may happen that b is -ve. In that case, |a| will become -ve but this is against the modulus rules.
So, |A| = B is correct only when we are given that B is positive.
Let me know in case of more doubts.
Thank you for your fast reply!
What I mean is (please tell me if my reasoning is correct):
If I say |A| = |B|, I am saying A = B or A = -B, right?
Instead, what |A| = B means?
Thank you
