/sci/ - Science & Math

>>11601645
Yes.
>>11601879
khanacademy. Watch at 400x speed in silence and then do exercises.
>>11602372
it looks fine, I think
>>11603086
L=3W+1; H=2W-5; LWH=8436. So three equations three unknowns. You get a cubic equation that uniquely determines width to be W=12.
>>11603485
definitely not
>>11601997
Nah. The ideal low pass filter just looks like a rectangular function in the frequency domain. Inverse Fourier Transform then gives you the sinc function to be the impulse response. In other words, [math]
h(t)=\mathcal{F}^{-1}\{\text{unit rectangular function centered at origin}\}=\text{sinc }t=(\sin t)/t [/math]