一、j囊空与作圈(每小题2分,满分50分) (1)2的相反数是 -. (2)不等式一红l的解集是 . (3)计算l(一3z。)。= . (4)二元一次方程z一2y=1有——个解. (5)当z=——时,分式善兰{的值是零. 一 l ’ (6)如果√z一4,那么z= . (7)如果一元二次方程,一4z一们=O有两个相等的实数根.那么m= One, j bag empty and make a circle (each question 2 points out of 50 points) (1) The opposite of 2 is -. (2) Inequality a red l solution set is. (3) Calculation l (a 3z. ). = (4) The binary first-order equation z = 2y = 1 has - a solution. (5) When z = -, the value of the fractional good blue is zero. A l ’(6) if z = 1 4, then z = . (7) If a quadratic equation, a 4z and a = O have two equal real roots, then m =