144/169-169/196的绝对值/(12/13+13/14)
144/169-169/196的绝对值/(12/13+13/14)
日期：2022-03-21 21:07:19 人气：1
l144/169-169/196l/(12/13+13/14)
=l144/169×13×14-169/196×13×14l/(12/13×13×14+13/14×13×14)
=l144×14/13-169×13/14l/(12×14+13×13)
=l144+144/13-16
=l144/169×13×14-169/196×13×14l/(12/13×13×14+13/14×13×14)
=l144×14/13-169×13/14l/(12×14+13×13)
=l144+144/13-16