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HELP!!! HELP!!

Find the greatest integer k for which \({ 1991 }^{ k }\)divides

\({ 1990 }^{ { 1991 }^{ 1992 } }\)+ \({ 1990 }^{ { 1991 }^{ 1990 } }\)

I am desperate to know the solution of this good question. Please give the solution in detail.

Note by Kartik Sharma
3 years ago

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