Question 1203021
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There is a "b" in both of these problems which is not defined.  Possibly in the reference you are using "b" is defined; but it has no standard meaning, so we have no idea what it is supposed to mean.  And therefore of course we can't help you with the problem.<br>
If you want help with the problem, re-post it in a way that we have a chance of being able to help....<br>