Edexcel A Level Maths: Pure:复习笔记2.1.3 Surds - Rationalising the Denominator
Surds - Rationalising the Denominator
What does it mean to rationalise a denominator?
- Rationalising a denominator changes a fraction with surds in its denominator, into an equivalent fraction where the denominator is a rational number (usually an integer) and any surds are in the numerator
- There are three cases you need to know how to deal with when rationalising denominators:
Exam Tip
- If an exam question asks you to give an answer, for example, "in the form p + q√3 , where p and q are rational numbers", this does NOT mean that p and q have to be integers, or positive!
- Remember: both integers and fractions (both positive and negative) are rational numbers
Worked Example
转载自savemyexams
国际竞赛真题资料-点击免费领取！
美高学分项目重磅来袭！立即了解
AMC8备考管家服务全新上线！
