Question

b) (4 + 8 + 12 + 16 + ... + 100) : (2 + 4 + 6+ ... +50);
d) (6 + 12 + 18+ ... + 300) : (3+6+9+ ... + 150).​

Answer 1

Răspuns:

4*(1+2+3+4+....+25):2*(1+2+3+...+25)=

4*25*26:3:2*25*26:2=100*13:50*13=2

6*(1+2+3+...+50):3*(1+2+3+...+50)=

6*50*51:2:3*50*51:2=6*25*51:3*25*51=150*51:75*51=2