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by geetikab605
Sat May 02, 2020 2:52 pm
 
Forum: Manhattan Prep GMAT CAT Math
Topic: x^a=x^b; is a=b
Replies: 1
Views: 250
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x^a=x^b; is a=b

Hi, I am a little confused by a problem on the Manhattan CAT paper If ab ≠ 0, does a = b? (1) x^a= x^b (2) x = x^2 I understand why (2) is NOT sufficient but why cant (1) by itself be sufficient I can solve it like so:- x^a=x^b => x^a/x^b= 1 => x^(a-b)=X^0 thus since the base is a common acros...