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题型:综合题 题类:常考题 难易度:普通
实数的运算+++++++5
= ,验证 = = = ;
= ,验证: = = = ;
= ,验证: = = = .
(1)如果(a﹣2)+b+3=0,其中a、b为有理数,试求a,b的值;
(2)如果(2+)a﹣(1﹣)b=5,其中a、b为有理数,求a+2b的值.
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