- Y''+2y'+3y=sinx?

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How to do division sign? Chemistry Help. Identify the substance that is an ion.
a. HClO4 b. CaBr2 c. Br- d. SO2? One can enclose a finite area with a curve of infinite perimeter? The phasor 6 + j2 corresponds to a sinusoidal waveform of the form Asin(wt+b).
What is the phase angle b (in radians)? Please help with problem 9 and 10?