Another lesser-known integration trick is "integration by inversion"pic.twitter.com/jZFABkIE7B
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"integration by inversion" is actually just the substitution u=1/x, but when it's useful we give it a special name i suppose ¯\_(ツ)_/¯pic.twitter.com/s7qyKwl51I
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Note: this substitution is valid when the anti-derivative of f(x) is bounded
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It means for this one should first know the anti-deravative then what is usefulness of this identity?
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