Question

Упростите выражение:6/7*7/8*8/9*9/10*10/11*11/12*12/13*13/14*14/15

Answer 1

6/7×7/8×8/9×9/10×10/11×11/12×12/13×13/14×14/15=
=6/8×8/10×10/12×12/14×14/15=
=6/10×10/14×14/15=
=6/14×14/15=
=6/15=2/5