Question

[x+1]+[x+2]+[x+3]+[x+4]+[x+5] 

Answer 1

(x + 1) + (x + 2) + (x + 3) + (x + 4) + (x + 5)

= x + 1 + x + 2 + x + 3 + x + 4 + x + 5

= (x + x + x + x + x) + (1 + 2 + 3 + 4 + 5)

= (x + x + x + x + x) + 15

= x * 5 + 15

Answer 2

Ta có:

(x+1)+(x+2)+(x+3)+(x+4)+(x+5)

=x+1+x+2+x+3+x+4+x+5

=(x+x+x+x+x)+(1+2+3+4+5)

=(x+x+x+x+x)+15

=5x+15

Nhớ thanks nha

Answer 3

(x + 1) + (x + 2) + (x + 3) + (x + 4) + (x + 5)

= x + 1 + x + 2 + x + 3 + x + 4 + x + 5

= (x + x + x + x + x) + (1 + 2 + 3 + 4 + 5)

= (x + x + x + x + x) + 15

= 5x + 15