Qualification > Math
MATH HELP...!! URGENT...
nits94:
see ...its like 2 to the power 5 is 32 right? so 32^n=2^5...so n=5...thats it...got it???
Deep:
For the 1st 1..
U don't really ahve to use log.. I just realised that..
It's pretty simple in fact
32 = 2^5
n Root of 32 = 32^(1/n)
Implying that 2^(5/n) = 8
Now, 8 = 2^3
=> 32^(1/n) = 2^(5/n) = 8 = 2^3
2^(5/n) = 8 = 2^3
=>> Equating the powers of 2
5/n = 3
n = 5/3
This method is useful if you are not allowed the use of a calculator
Ghost Of Highbury:
--- Quote from: priyu22 on October 27, 2009, 11:29:07 am ---From wer do u get 5?? Can we use log for this question???
--- End quote ---
how will u express 4 as 2x
ofcourse it is 22 which is equal to 4
samething for 32
2what? = 32
2^5 = 32
yes u can use log this way
----
2x = 32
log232 = x
in ur calculator do this
(log 32)/ (log 2) to get the answer 5
follow the rest of the steps for solving
@nits94 - n is not equal to 5...u have to express 32 as 2^5 adn then do it
sameer210394:
--- Quote from: priyu22 on October 27, 2009, 11:29:07 am ---From wer do u get 5?? Can we use log for this question???
--- End quote ---
this question does not expect log, though you can use...
32n = 2
in this case u have to rearrange 32n in such that its base is 2.
so 32 can be written as 25.
so now
25n = 2
now as the base are same, the power has to be the same, therefore 5n = 1
now solve for n and the answer is 0.2 or 1/5
Ghost Of Highbury:
--- Quote from: priyu22 on October 27, 2009, 11:23:34 am ---this is d quest...
--- End quote ---
the above was the answer for the quoted one..
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