Булеан - <span>множество всех подмножеств данного множества.
B(A): {</span>∅<span>} | {1} | {4} | {7} | {10} | {1,4} | {1,7} | {1,10} | {4,7} | {4,10} | {7,10} | {1,4,7} | {1,4,10} | {1,7,10} | {4,7,10} | {1,4,7,10} </span>
<span>(180-64)/2=58 градусов</span>
10⁵-(10²)³=10⁵-10⁶=10⁵(1-10)=100000*(-9)=-900000
1) 3/5-4/5=-(4/5-3/5)=-1/5
2) 2/7-(3/7)=2/7-3/7=-(3/7-2/7)=-1/7
3) -1/2-1/4=-2/4-1/4=-(2/4+1/4)=-3/4
4) -2/9-(-1/3)=-2/9+1/3=-2/9+3/9=3/9-2/9=1/9
5) -4,8-5,9=-(4,8+5,9)= - 10,7
6) 7-9,13= - (9,13-7)= - 2,13