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#1 2008-03-11 22:31:18

tony123
Member
Registered: 2007-08-03
Posts: 228

solve

solve

i know its 4 but how

Last edited by tony123 (2008-03-11 22:33:29)

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#2 2008-03-13 20:54:23

gyanshrestha
Member
Registered: 2007-11-06
Posts: 41

Re: solve



hence x=4


http://gyan.talkacademy.com.np

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#3 2008-03-13 21:26:11

mathsyperson
Moderator
Registered: 2005-06-22
Posts: 4,900

Re: solve

That method is just a way of showing that the answer is 4, rather than analytically finding that the answer is 4.

I can't think of a way to solve this other than by inspection, but what I can do is observe that the function is strictly increasing, and so 4 is its unique solution.


Why did the vector cross the road?
It wanted to be normal.

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