1/2+1/3 ; 2/7-1/9; 2/3+5/8; 4/5+5/9с решение пж

Question

1/2+1/3 ; 2/7-1/9; 2/3+5/8; 4/5+5/9
с решение пж

Answer 1

1/2+1/3=1/2³+1/3²=3/6+2/6=5/6
2/7-1/9=2/7^9 - 1/9^7 = 18/63 - 7/63 = 11/63
2/3+5/8= 2/3^8+5/8³=16/24+15/24=31/24=1 7/24
4/5+5/9=4/5^9+5/9^5=36/45+25/45=61/45=1 16/45