About Lesson
17.1 Indices 指数
1.
If x + x = 4, find the value of x
+ x – 3.
若x + x = 4, 求 x
+ x – 3 的值
Answer:
52
2.
Solve the following simultaneous equations :
解下列联立方程式
5 . 125
= 1
9 = 81 . 27
Answer:
–2,
3.
Given that and
, find the values of x and y.
已知 和
, 求 x 和 y的值.
Answer:
1, ![Rendered by QuickLaTeX.com -\frac{2}{3}](data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIyOSIgaGVpZ2h0PSIyOSIgdmlld0JveD0iMCAwIDI5IDI5Ij48cmVjdCB3aWR0aD0iMTAwJSIgaGVpZ2h0PSIxMDAlIiBmaWxsPSIjZWFlYWVjIi8+PC9zdmc+)
![Rendered by QuickLaTeX.com -\frac{2}{3}](https://learn-ondemand.com/wp-content/ql-cache/quicklatex.com-110f55358b9e859f5fa2a9ae4da9f0de_l3.png)
4.
Given that . State c in terms of a and b.
已知. State c in terms of a and b.
Answer:
![Rendered by QuickLaTeX.com c = \frac{ab}{a+b}](https://learn-ondemand.com/wp-content/ql-cache/quicklatex.com-c2f6b92c32af956b8b85be202508817d_l3.png)