Which is a counterexample that disproves the conjecture?

For all real numbers n, 2n ≥ 1.

A.

n = 0

B.

n = 0.5

C.

n = –1

D.

n = 3

Question

Which is a counterexample that disproves the conjecture?

 

For all real numbers n, 2n ≥ 1.
  
 
 

 
 

  

  A. 
 
n = 0
   
   

 
 

  

  B. 
 
n = 0.5
   
   

 
 

  

  C. 
 
n = –1
   
   

 
 

  

  D. 
 
n = 3

anonymous · Answer

-1 because 2(-1) >/ 1 is a false statement

anonymous · Answer

Oh thank you :)

unklerhaukus · Answer

2n ≥ 1

if n is zero 
      the equation becomes 

2(0) ≥ 1

0 ≥ 1     which is also a false statement