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exponents

by tj123 » Fri Dec 26, 2008 1:29 am
The Value of (10^8 - 10^2) / (10^7-10^3) is closet to which of the following?

A) 1
B) 10
C) 10^2
D) 10^3
E) 10^4

Answer is B

Please expalin how to get to answer
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by vishubn » Fri Dec 26, 2008 2:00 am
its discused before !!

neverthless !!

u take 10^2 common factor in numerator

10^3 in deno

cancels and ignore -1 !!

and u get 10^6/10^5=10 is the answer

vishu
KILL !! DIE !! or BEAT my FEAR !!! de@D END!!
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by tj123 » Fri Dec 26, 2008 7:35 pm
10^7 - 10^3

Take out 10^3

10^3(10^4- 1)

so numerator on top of denom you get:

10^6/10^4

which would be 10^2

right?
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by vishubn » Fri Dec 26, 2008 7:40 pm
10^2(10^6-1) is the numerator

10^3(10^4-1)

so 10^2 cancels out in numerator

and numerator is 10^6

but numerator we have 10 left, and after ignoring -1 we have 10^5 in denominator

10^6/10^5

OA 10

vishu
KILL !! DIE !! or BEAT my FEAR !!! de@D END!!
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