Teng emas A={1,2,3} va B={2,4,5} to‘plamlar berilgan bo‘lsa, a va b to‘plamlarning simmetrik ayirmasini toping. {1,3,4,5}

X G grafning qirralari

38. 
    45 xil bolt va 16 xil gaykadan bittadan olinib, necha xil juftlik tuzish mumkin?
    

• 
  720
  

39. 
    x——y ifoda quydagilarda qaysi biriga teng?
    

• 
  —xVy
  

40. 
    x={chin, chin, yolg‘on, yolg‘on} va y={chin, yolg‘on, chin, yolg‘on} bo‘lsa (x A y) ^ y ni qiymatini toping?
    

• 
  {chin, chin, yolg‘on, chin }
  

41. 
    5 ta tovuq, 5 ta o‘rdak va 4 ta g‘oz bor. Uchta parrandani shunday tanlab olingki, ular ichida tovuq, o‘rdak va g‘oz bo‘lsin. Shunday tanlashlar soni nechta bo‘ladi?
    

• 
  100
  

42. 
    A={x: |x - 4| < 8, x eN} to‘plamning eng kichik elementini toping.
    

• 
  1
  
• 
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1. 
   A={1,2,3,a,c} , B={2,a,b} berilgan bo‘lsa, A va B to‘plamlarning simmetrik ayirmasini toping.
   

• 
  {l,3,b,c}
  

2. 
   R-munosabatga tegishli juftliklar birinchi elementlaridan iborat to‘plamga aytiladi?