Question

cho x₁+x₂+x₃+...+x₄₉+x₅₀+x₅₁=0va x₁+x₂=x₃+x₄=...=x₄₇+x₄₈=x₄₉+x₅₀=x₅₀+x₅₁=1.tinh x₅₀

Answer 1

(x₁ + x₂) + (x₃ + x₄)  +..... + (x₄₉ + x₅₀₎ + x₅₁

=  1 + 1+  1 + .... + 1 + x₅₁ = 0

= 25 + x₅₁ = 0

x₅₁ = 0 - 25

x₅₁ = -25

Answer 2

x₁+x₂+x₃+...+x₅₀+x₅₁=0

=>(x₁+x₂)+(x₃+x₄)+...+(x₄₉+x₅₀)+x₅₁=0

=>1+1+1+...+1+x₅₁=0

=>25+x₁=0

=>x₅₁=-25

=>x₅₀=1-(-25)=26

Answer 3

x1+x2+x3+x4+x5+...+x47+x48+x49+x50+x51=0

25+x51=0

=> x51=-25

=>x50=26