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#1 2006-12-28 01:22:19
- balasvce
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- Registered: 2006-12-20
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can yu make this question complete . justify!
1.n=s^2t; n is a multiple of 7 and which is multiple of 49
options were
s^2t
s^2
t and some thing like...i hope answer is s^t
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#2 2006-12-28 08:12:26
- krassi_holmz
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Re: can yu make this question complete . justify!
Nope. We're sure only for 7/s^t.
So 7^2/(s^t)^2 = s^2t, option 1
IPBLE: Increasing Performance By Lowering Expectations.
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#3 2006-12-29 03:08:57
- er.neerajsrivastava
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Re: can yu make this question complete . justify!
how can it be sure as s^2t itself is multiple of 7, i think atleast it should be s^4t.
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#4 2006-12-29 06:36:28
- krassi_holmz
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Re: can yu make this question complete . justify!
how can it be sure as s^2t itself is multiple of 7, i think atleast it should be s^4t.
So s^2t is a square:
s^2t=a*a (a=s^t)
AND...
7 is prime number.
Knowing that if a prime number divides a square of x, then it also divides x, we get:
7/s^t, so 7^2/s^2t
IPBLE: Increasing Performance By Lowering Expectations.
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#5 2006-12-29 06:46:00
- Ricky
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Re: can yu make this question complete . justify!
Knowing that if a prime number divides a square of x, then it also divides x
Or in more general terms:
"In the real world, this would be a problem. But in mathematics, we can just define a place where this problem doesn't exist. So we'll go ahead and do that now..."
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#6 2006-12-29 06:52:15
- krassi_holmz
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Re: can yu make this question complete . justify!
Or more general:
Last edited by krassi_holmz (2006-12-29 06:52:51)
IPBLE: Increasing Performance By Lowering Expectations.
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#7 2006-12-29 15:34:14
- Ricky
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Re: can yu make this question complete . justify!
Or more general:
"In the real world, this would be a problem. But in mathematics, we can just define a place where this problem doesn't exist. So we'll go ahead and do that now..."
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#8 2006-12-30 03:51:12
- krassi_holmz
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- Registered: 2005-12-02
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Re: can yu make this question complete . justify!
Or more general:
Last edited by krassi_holmz (2006-12-30 03:52:09)
IPBLE: Increasing Performance By Lowering Expectations.
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