# #A# takes 6 days less than the time taken by #B# to finish a piece of work. If both #A# and #B# together can finish it in 4 days, how many days will #B# take to finish the work?

We have to think about how much work can be done in a day when dealing with problems like these.

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Let the time taken by B to finish the work be ( x ) days. Then, A takes ( x - 6 ) days to finish the work. Their combined rate of work is ( \frac{1}{x} + \frac{1}{x-6} = \frac{1}{4} ). Solving this equation, we find that ( x = 12 ) days. So, B takes 12 days to finish the work.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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