Question 1185059
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I suspect the other tutor answered the wrong problem, since the question is not posed well....<br>
"find the sixteenth term IN THE EXPANSION OF of (2-1/x)^18"<br>
{{{(C(18,15))((2)^3)((-1/x)^15)}}}
{{{(C(18,3))(8)(-1/x^15)}}}
{{{-6528/x^15}}}<br>
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The above answer is a correction of my original response below.<br>
The 16th term in the expansion is the one with the (-1/x) term to the 15th power, not the 16th.<br>
{{{(C(18,16))((2)^2)((-1/x)^16)}}}
{{{(C(18,2))(4)(1/x^16)}}}
{{{612/x^16}}}<br>