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If P( 9,r ) = 3,024, what is r ?

plz plz plz... help mè

I mark it... :(​


Sagot :

Answer:

[tex] \frac{9i}{(9 - r)i} = 3024 \\ (9 - r)i = 9i \div 3024 = 362880 \div 3024 = 120 = \\ = 1 \times 2 \times 3 \times 4 \times 5 = 5i \\ r = 4[/tex]