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Algebra> What is the formula to calculate no. of o...

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What is the formula to calculate no. of onto functions in a relation A to A where A has n distinct elements?

Balaka Biswas , 8 Years ago

Grade 11

1 Answers

Vivaswan Bachchan

Last Activity: 8 Years ago

let a and b are finite sets having mand n elements respectively then no. of ono function form a to b is

sigma(r=1 to n)(-1)^n-rCr*r^m

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