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做数学作业时,一不小心打翻了墨水瓶,污染了题目该怎么办?有什么办法来补救吗?下面请刘老师带大家看一看.例1小虎在做作业时,不小心将方程中的一个常数污染了,被污染的方程是“2x-1/2=(1/2)x-※”(其中※是一个常数),怎么办呢?聪明的小虎想了想,翻看后边的参考答案,得知此方程的解是x=-5/3.于是他很快算出了被污染的常数,并迅速完成了作业.你能求出这个常数吗?分析:可以设被污染的常数为a,将x=-5/3代入方程2x-(1/2)=(1/2)x-a中,即可求出a的值.解:设被污染的常数为a,则原方程可写
When I was doing mathematics work, I accidentally overturned the ink bottle and contaminated the subject. What should I do to remedy it? Please ask Mr. Liu to take a look at it. Example 1 When the tiger did his homework, he accidentally put the equation. One of the constants is contaminated. The polluted equation is “2x-1/2=(1/2)x-※” (where * is a constant). What should I do? The smart tiger thought for a while and turned it over. Looking at the reference answer in the back, we know that the solution of this equation is x=-5/3. So he quickly calculated the contaminated constant and completed the job quickly. Can you find this constant? Analysis: Can be set The constant of contamination is a. Substituting x=-5/3 into the equation 2x-(1/2)=(1/2)xa, we can find the value of a. Solution: Let the contaminated constant be a, then The original equation can be written