f(x)在[0,1]上有连续的二阶导数，f(0)=f(1)=0,任意x属于[0,...715af2ac3f81f8.png"]

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2021-04-14 问题

f(x)在[0,1]上有连续的二阶导数，f(0)=f(1)=0,任意x属于[0,...715af2ac3f81f8.png"]

2022-06-19 问题

某人年初存入银行2000元，存款利率为8%，则第10年年末的本利和为（） A: F=2000[(F/A,8%,11)-1] B: F=2000[(F/A,8%,10)](1+8%) C: F=2000[(F/A,8%,10)+1] D: F=2000*[(P/A,8%,10)+1]

某人年初存入银行2000元，存款利率为8%，则第10年年末的本利和为（） A: F=2000*[(F/A,8%,11)-1] B: F=2000*[(F/A,8%,10)]*(1+8%) C: F=2000*[(F/A,8%,10)+1] D: F=2000*[(P/A,8%,10)+1]

2022-07-01 问题

已知函数f(x)是奇函数,且f(2)＝1,则[f(-2)]³＝( ) A: 1 B: 8 C: -1 D: -8

2022-07-29 问题

The climax of “Everyday Use” occurs when ____. A: the mother takes the quilts from Dee and gives them to Maggie B: Dee's boyfriend arrives C: Dee makes dinner for her boyfriend D: Dee sets fire to the house

The climax of “Everyday Use” occurs when ____. A: the mother takes the quilts from Dee and gives them to Maggie B: Dee's boyfriend arrives C: Dee makes dinner for her boyfriend D: Dee sets fire to the house

2022-05-30 问题

将函数\(f(x)=\sin^4 x\)展开成Fourier级数为 ____ . A: \(f(x) = \frac{3}{8}-\frac{1}{2}\cos 2x +\frac{1}{8}cos 4x\) B: \(f(x) = \frac{1}{4}-\frac{1}{2}\cos x +\frac{3}{8}cos 4x\) C: \(f(x) = \frac{1}{4}-\frac{1}{2}\sin 2x -\frac{3}{8}cos 4x\) D: \(f(x) = \frac{3}{8}-\frac{1}{2}\sin x -\frac{1}{8}cos 4x\)

将函数\(f(x)=\sin^4 x\)展开成Fourier级数为 ____ . A: \(f(x) = \frac{3}{8}-\frac{1}{2}\cos 2x +\frac{1}{8}cos 4x\) B: \(f(x) = \frac{1}{4}-\frac{1}{2}\cos x +\frac{3}{8}cos 4x\) C: \(f(x) = \frac{1}{4}-\frac{1}{2}\sin 2x -\frac{3}{8}cos 4x\) D: \(f(x) = \frac{3}{8}-\frac{1}{2}\sin x -\frac{1}{8}cos 4x\)

2021-04-14 问题