Question 1108081
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To get a constant, you need to take the "p" term and the "-1/p" terms an equal number of times.  Since the binomial is to the 6th power, you need to take each term 3 times.  The coefficients of the terms are 1 and -1; so the coefficient of the constant term is<br>
{{{C(6,3)*(1)^3*(-1)^3 = -C(6,3) = -20}}}