My2mat7 My2mat7
  • 14-08-2017
  • Mathematics
contestada

Counter example to show the statement is False?


X + X > X

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apologiabiology
apologiabiology apologiabiology
  • 14-08-2017
hmm

x+x>x can be rewritten as
2x>x
when is it false?
simple way is for us to solve
2x=x or
2x<x

for 2x=x, x=0 for it to be false
for 2x<x, x<0 for it to be false


so any number that is 0 or negative will disprove it


ok, I pick -3

x+x>x
(-3)+(-3)>-3
-6>-3
false
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