1.if f(x)=x+1 and g(x)=x^2+1,determine g(f(x))and f(g(0))
2.simplify (3y^2)(2y^2)^4/(y^2)^3
3.evaluate log27-log9/log81 without using calculator
4.express π/20 radian into degrees
幫幫我,有幾條數學唔識please
2012-10-18 1:13 am
回答 (2)
2012-10-18 3:43 am
✔ 最佳答案
1. g(f(x))=(x+1)^2 + 1 = x^2 + 2x +1 +1 = x^2 + 2x + 2and f(g(x))=(x^2 + 1 ) + 1 = x^2 + 2
f(g(0))=2
2. (3y2)(16y8) / (y6) = 48y10 / y6 = 48y4
3. is it (log27-log9)/(log81) or log27-(log9/log81) ?
4. 180/20 = 9degrees
2012-10-18 5:16 am
is log27-log9/log81
收錄日期: 2021-04-13 19:03:22
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20121017000051KK00301