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## Math Help Resources

I want to find 2 linearly independent solutions, as power series in x, of: 4xy''+2(1-x)y' -y=0 And for one of the solutions, I want to express it in terms of elementary functions...

An eccentric clockmaker built three different clocks. The first clock was a five-minute clock designed with an alarm set to sound each time the hand reached the number 2. The second...

Could anyone be kind and solve this? "Decide |z|, arg z(line above it), Re z ,Im z(line above it) for z=1−i." Did it, but did it wrong, so please post steps how you came...

1) CBS and the NYT conducted a national poll of 1048 randomly selected 13 to 17-year olds and counted how many owned smart phones. The reporters were trying to decide whether more than half of teenagers...

Please solve:   "z1 = 4 (cos 45° + i sin 45°) and z2 = 2 (cos 30° + i sin 30°).   What's z1 * z2?   What's z1/z2?"   Did it myself...

Could anyone be kind and solve this?   "Decide |z|, arg z(line above it), Re z ,Im z(line above it) for z=1−i."   Did it, but did it wrong, so please post...

What angle do the moths need to travel at to find their way back at sunset?