Posted by Subhotosh Khan on October 09, 2002 at 10:07:49:
In Reply to: Here's another one posted by Jmiah on October 08, 2002 at 20:47:03:
: Here's another one. Please remember that the people who wrote the book are only human.
: 36[x^5][y^2][z^-2]/9[x^0][y^4][z^-3]=
: I got:
: 4[x^5][y^-2][z^-5]
: The book said:
: 4[x^5][y^-2][z]
: Please remember th double negative. Thanx!
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The problem should be written:
36[x^5][y^2][z^-2]/{9[x^0][y^4][z^-3]}
=36/9 *x^(5-0) * y^(2-4) * z^(-2-(-3))
=4 x^5 * y^(-2)* z^(-2+3) ....[without forgetting the double negetive]
So book is CORRECT
by the way, "problem as presented" will have following answer:
36 * [x^5] * [y^2] * [z^(-2)]/9 * [x^0] * [y^4] * [z^-3]
=4 * [x^5] * [y^6] * [z^(-5)]