I've been scratching my head over this one:
That is to say,
My first thought was to say
Then to find and by partial fractions and do a summation table, but couldn't get it out. Any suggestions from anyone?
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Originally Posted by Stephen Shaw Evaluate:
That is to say, Think about it for a moment.
That is simply the number of subsets of a set of 40 elements: .
Let we have
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