Solving an 'impossible' integral nearly instantly

The Putnam competition is legendary for having challenging questions. But this integral from the 1980 test can be solved in seconds with a simple technique.

Putnam 1980, A3 unofficial solution
https://prase.cz/kalva/putnam/psoln/p...

Solve Integrals In Just Seconds! (JEE Mains)
   • Solving 'impossible' integrals in sec...  

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