f*********s
发帖数: 34 | 1 I found out the answer:
a=1/9, b=-2/9, c=4/9
a+b+c=1/3
but still couldn't figure out the solution. This problem is supposed to be
solved in an hour. Obviously I failed to do it, but still interested enough
working it out.
Thanks for the suggestion.
school
worked |
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