Question

a=2+4+6+.........+100+51=K la puterea a doua
Am nevoie urgent va rog.Multumesc​

Answer 1

Explicație pas cu pas:

a=2+4+6+...+100+51=>

a=2(1+2+3+..+50)+51=>

a=2×(50×51)/2+51 =>a=51×50+51 =>a=51²=>k²=51² =>k=+-51