Term independent of x in (ax^p + b/x^q)^n (Net power: p(n−r)−qr=0 (typical); solve for r integer in 0n)

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Net power: p(n−r)−qr=0 (typical); solve for r integer in 0..n

What each symbol means

SymbolWhat it stands for
rBinomial index
p,qInteger exponents in bases

When to use this

Integer r in range; else no constant term.