✔ 最佳答案
NO! NO! NO!
The two fractions are not equal for every value of x:
When x = 0, 9x/16x is undefined.
If x is any value other than 0, then the x's cancel out and the fractions are equivalent.
As you study more algebra and calculus, you're going to get a lot more of these sorts of trick questions. So when checking for equality, it's good to make sure to check for all values of x (or whatever your variables are).