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सिद्ध कीजिए की: a^(2) -b^(2) +( a^(4)...

सिद्ध कीजिए की:
` a^(2) -b^(2) +( a^(4) -b^(4))/(|__2)+(a^(6) -b^(6))/( |__3) +..........` अनंत तक `=e^(a^(2))-e^(b^(2))`

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