Question

x=2+4+6+8+....+100-25×2​

Answer 1

Răspuns:

Explicație pas cu pas:

2 ori (1+2+3+4.........+50) -25 x2= 2 ori (50 ori 51/2) -50= 2 ori 1275 -50= 2550 -50= 2500

Answer 2

Răspuns:

25x2=50

2+4+6+8+...+100-50

2+4+6+8+...+100=(100-2):2+1

=98:2+1

=49+1=50

(100+2)x50:2

=102x50:2

=5100:2

=2550-50

X=2500