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who can solve for me this :
2 ^ ( x ) * 5 ^ ( y ) = 200
2 ^ ( y ) * 5 ^ ( x ) = 500
whats the value of x and y ?!
i tried more than once but no chance ... help me please this is my first post here
By inspection, x = 3, y = 2. (Factorize 200 and 500.)
Well, these particular equations happen to be easily solvable by inspection, but in general, you can take logarithms for such equations. They will then be converted into simultaneous linear equations, which should be easier to solve.
Last edited by JaneFairfax (2007-02-26 07:55:38)
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they way you solved it please please
By inspection,
200 = 2[sup]3[/sup]·5[sup]2[/sup]
500 = 2[sup]2[/sup]·5[sup]3[/sup]
But all right, lets do it systematically
Taking logarithm on both sides (the log can be to any base; here log[sub]10[/sub] will be fine), you get
Now solve for x and y.
Last edited by JaneFairfax (2007-02-26 10:03:13)
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i got these equations ... but the problem is in solving them ... please solve it
Last edited by luca-deltodesco (2007-02-26 06:33:03)
The Beginning Of All Things To End.
The End Of All Things To Come.
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Now ksa-boy, I hope that when you submit your homework you make sure to put luca-deltodesco's name on it. ;-)
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uhhhhhhhh
i'm just gonna listen + learn
Zappzter - New IM app! Unsure of which room to join? "ZNU" is made to help new users. c:
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thanks alot alot luca-deltodesco ... my problem was in solving the two equations with each other
and dont worry Maelwys i'll write his name (a):D
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