Question

17supra42:[(1supra5+1supra5•1supra9):7supra30-1supra3]. Va rog ajutatima.

Answer 1

ai rezolvarea în imagine

Answer 2

17/42:[(1/5+1/5•1/9):7/30-1/3]
=17/42:[(1/5+1/45):7/30-1/3]
=17/42:[(9/45+1/45):7/30-1/3]
=17/42:(10/45:7/30-1/3)
=17/42:(10/45•30/7-1/3)
=17/42:(10/9•6/7-1/3)
=17/42:(69/63-1/3)
=17/42:(69/63-21/63)
=17/42:48/63
=17/42•63/48
=1071/2016
=17/32