在实数范围内定义一种运算“*”,其规则为a*b=,根据这个规则,方程

在实数范围内定义一种运算“*”,其规则为a*b=,根据这个规则,方程(x+2) *5=0的解为______

答案

3或-7解析:

相关题目

日本名人久坂玄端对“尊王攘夷”曾这样说道:“诸侯终不
日本名人久坂玄端对“尊王攘夷”曾这样说道:“诸侯终不足恃,公卿亦不足恃……除草莽志士纠合举义之外,别无他策。”材料中的“草莽志士”主
当太阳光线直射赤道时,下列各地哪个太阳高度角最低(   
当太阳光线直射赤道时,下列各地哪个太阳高度角最低(     ) A.10°N              B.50°N              C.20°S          D.80°S
下图是某工业区位因素对工业区位选择的影响力随时间变化
下图是某工业区位因素对工业区位选择的影响力随时间变化曲线图,该工业区位因素可能是下列中的(    ) A.原料  B.技术   C.劳动力素质  D.交
-City air is very dirty, so it would be wise ___ you wash your hair often. ---I
-City air is very dirty, so it would be wise ___ you wash your hair often. ---I know, but it is not easy ____ me to do that every day. A. for, of    B. of, of     C. of, for     D. for,
  将甲烷和乙烯的混合气体共0.2mol通入溴水中,发生反应的
  将甲烷和乙烯的混合气体共0.2mol通入溴水中,发生反应的化学方程式是 ,反应的类型为     ,若充分反应后溴水增重2.8克,则原混合气体中甲烷
—Little Daniel is watering the flowers! Why? —Well, I'm not feeling very w
—Little Daniel is watering the flowers! Why? —Well, I'm not feeling very well today—otherwise I ________ it myself. A. did       B. would do           C. have done          D
 一定量的木炭与过量的氧气在密闭容器内加热使其充分反应
 一定量的木炭与过量的氧气在密闭容器内加热使其充分反应,下图中能正确反映容器内有关的量随时间变化关系的图像是                     
 The experiment has ______ the possibility of the existence of any life on tha
 The experiment has ______ the possibility of the existence of any life on that planet, but it does not mean there is no life on other planets. A. found out     B. pointed out    C. ruled

最新题目