let a and b be any positive integers and x=0 or 1,then
a)a^xb(1-x)=x*a+b(1-x)
b)a^xb(1-x)=a(1-x)+x*b
c)a^x*b(1-x)=a*(1-x)*b*x
d)None of these necessarily true
2006-07-19
04:43:27
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7 answers
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asked by
sanko
1
in
Science & Mathematics
➔ Mathematics
is this question not clear ?
my book has given only the answer but no explanation....the book has suggested to use "method of substitution"
but as you see, its difficult to use what to substitute .
BTW, any have a nice answer ?
2006-07-19
04:55:11 ·
update #1
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hmm...none of the answer so far matches with my book.....
2006-07-19
05:22:54 ·
update #2
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anser given is (a)
2006-07-19
06:03:28 ·
update #3