10)
a) 2/3<3/10<4/11
b) 4/11<3/8<6/13
c) 3/11<2/5>9/31
d) 10/9<6/5>30/29
e) 32/75>4/11<8/19
f) 12/25<18/29>4/7
11)
a)
2^27+2^27/26^27+26^28 = 2^27(1+1) /26^27(1+2)=2/3
2^26(2^3-1) / 2^26(1+2^3)= 2^3-1 / 1+2^3=7/9
2/3<7/9
b)
3^20-3^18 / 3^17+3^20 = 3^18(3^2-1) / 3^17(1+3^3)=3*8/1+27=3*2/7=6/7
3^21(3^2-1) /3^21(1+3^2) = 8^2/10=4/5
6/7>4/5
