问题 填空题

设a>b,则:

(1)2a______2b;

(2)(x2+1)a______(x2+1)b;

(3)3.5b+1______3.5a+1.

答案

设a>b,则:

(1)2a>2b;

(2)(x2+1)a>(x2+1)b;

(3)3.5b+1<3.5a+1.

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