Math Question. With Solution. Thanks?
回答 (2)
2016-02-03 7:39 am
✔ 最佳答案
f(x) = sin(πx)f ’ (x) = π cos(πx)
f ” (x) = －π² sin(πx)
f ” (1/2) =－π² sin(π/2) = －π^2
Answer (D)
2016-02-03 4:28 am
Sol
f(x)=Sin(πx)
f’(x)=df(x)/dx=dSin(πx)/d(πx)*π=πCos(πx)
f”(x)=df’(x)/dx=πdCos(πx)/dx=－π^2Sin(πx)
f”(1/2)=－π^2Sin(π/2)=—π^2
(D
f(x)=Sin(πx)
f’(x)=df(x)/dx=dSin(πx)/d(πx)*π=πCos(πx)
f”(x)=df’(x)/dx=πdCos(πx)/dx=－π^2Sin(πx)
f”(1/2)=－π^2Sin(π/2)=—π^2
(D
收錄日期: 2021-04-18 14:23:18
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160202183540AAc5daf