If x is positive, is x prime?
a) x^3 has exactly 4 distinct positive integer factors
b) x^2-x-6=0
Just to make this brief, Kaplan's reason to reject statement a) is that, as a counterexample, "6" has 4 distinct integer factors and it is not prime, even less a number to the cubic power... that is my problem there...
...if it is not a number to the cubic power, then why using it as a counterexample? the statement is indicating that unknown number has to be such that you raise it to the power of 3, and then the result happens to have 4 positive factors.
Who wrote this explanation?
a) x^3 has exactly 4 distinct positive integer factors
b) x^2-x-6=0
Just to make this brief, Kaplan's reason to reject statement a) is that, as a counterexample, "6" has 4 distinct integer factors and it is not prime, even less a number to the cubic power... that is my problem there...
...if it is not a number to the cubic power, then why using it as a counterexample? the statement is indicating that unknown number has to be such that you raise it to the power of 3, and then the result happens to have 4 positive factors.
Who wrote this explanation?
