Question

Determine r si: 8!/r!(8-r)! = 56

Answer 1

Respuesta:

Explicación paso a paso:

8!/r!(8-r)! = 56

8!/r!(8-r)! = 8×7

8!/5!(8-5)!=8×7×6×5!/5!(8-5)!

8!/5!(8-5)!=8×7×6×5!/5!(3)!

8!/5!(8-5)!=8×7×6/(3)!

8!/5!(8-5)!=8×7×6/6

8!/5!(8-5)!=8×7