General Term in (A x^p + B x^q)^n

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The general term in $$\left( A x^p + B x^q \right)^n$$ is:
$$ T_{r+1} = \binom{n}{r} A^{n-r} B^r x^{p(n-r) + q r} $$
for $$r = 0, 1, 2, \ldots, n$$.
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