Răspuns:
Explicație pas cu pas:
=(³⁵⁾5/3+²¹⁾7/5 +¹⁵9/7)- (³⁵⁾2/3+²¹⁾2/5+¹⁵⁾2/7)
= (175/105+147/105+135/105)-( 70/105+42/105+30/105)
= 457/105-142/105
=315⁽⁵/105⁽⁵
=63/21
=3
