在任意线性形式下L[af1(t)+bf2(t)]=aF1(s)+bF2(s).()

在任意线性形式下L[af1(t)+bf2(t)]=aF1(s)+bF2(s).()


相关考题:

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Iff1(t)←→F1(jω),f2(t)←→F2(jω)Then________。 A.[af1(t)+bf2(t)]←→[aF1(jω)*bF2(jω)]B.[af1(t)+bf2(t)]←→[aF1(jω)-bF2(jω)]C.[af1(t)+bf2(t)]←→[aF1(jω)+bF2(jω)]D.[af1(t)+bf2(t)]←→[aF1(jω)/bF2(jω)]

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f1(t)←→F1(jω),f2(t)←→F2(jω)Then()。A、[af1(t)+bf2(t)]←→[aF1(jω)*bF2(jω)]B、[af1(t)+bf2(t)]←→[aF1(jω)-bF2(jω)]C、[af1(t)+bf2(t)]←→[aF1(jω)+bF2(jω)]D、[af1(t)+bf2(t)]←→[aF1(jω)/bF2(jω)]

s=”this is the mainstring”,sub=”string”,strindex(s,sub)是()

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在任意线性形式下L[af1(t)-bf2(t)]= aF1(s)-b F2(s).()

单选题f1(t)←→F1(jω),f2(t)←→F2(jω)Then()。A[af1(t)+bf2(t)]←→[aF1(jω)*bF2(jω)]B[af1(t)+bf2(t)]←→[aF1(jω)-bF2(jω)]C[af1(t)+bf2(t)]←→[aF1(jω)+bF2(jω)]D[af1(t)+bf2(t)]←→[aF1(jω)/bF2(jω)]

多选题下列表示中____的表示形式是正确的。ApUsub95/sub= 1%,vsubeff/sub =9 /pBpUsubr/sub= 1%,k=2 /pCpusubC/sub=0. 5% /pDpusubC/sub=±0 5%.k=1 /p