High school mathematics hope cup test questions
The first part is to prove the sufficiency (forward push), and the second part is to prove the necessity (backward push), thus proving that m is a necessary and sufficient condition for n, and ordinary beginners will find the answer confusing or verbose. Also: the expression of the answer is really not clear enough. Can you put x? Change it to t and the equation becomes t? +pt+p- 1=0, (t>0) This may be better understood!