Question

1+3+5+...+99
2+4+6+...+100

Answer 1

b) 2( 1+2+ ….. + 50)
2 * 50 * 51: 2
2550

2( 1+ 2+ …. + 49) + 1 * 50
2 * 49 * 50 : 2 + 50
2500

Answer 2

Răspuns:

1+3+5+90=99

2+4+6+90=100

I hope that is the case so that we understand well what you mean