It is actually a function of y. The good news that we have is that this function normally depends on x.
实际上是一个y的函数,好消息是我们得到了关于x的函数。
Well, what is this distance? It is just y,or maybe absolute value of y.
这里的距离是什么?是y,准确地说是y的绝对值。
There it is X is 0, Y is 3. That's b.
X是0,y是3,那是b。
Many people hear it and think it is Mary,M-A-R-Y, instead of M-E-R-R-Y.
VOA: special.2009.12.21
Suppose f of x, y, z equals k1, that is my equation, s1 and it gives me a solution s1.
假设我的方程是这样,然后给出了一个解。
The power of linearity is F=k1+k2 if I come across f of x, y, z equals k1 plus k2, if it is a linear equation, I don't have to go and solve it all over again.
线性的威力是,一个方程,如果它是个线性方程,那么我就不用再去解他了。
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