Докажи что: 1/11+1/12+1/13+1/14+1/14> 1/3

1*12/11*12+1*11/11*12+1/13+1/14+1/14
23/132+1/13+1/14+1/14
23*13/132*13+1*132/13*132+1/14+1/14
431/1716+1/14+1/14
(1/14+1/14=2/14=1/7)
431/1716+1/7=431*7/1716*7+1*1716/7*1716=4733/12012
4733/12012>1/3