Solving those equations as in my previous comment, you get $wx = 157.22$, $wy = 102.18$ and $wz = 16.86$. (I had a different value for $wz$, but that...
As topsquark points out, equations 1. and 3. are incompatible as they stand. But suppose we change the constant on the right side of equation 3. from...
First, you need to include the information (given in the statement of Problem S395) that $a,b,c$ are positive integers. Without that information the...
Equality can only happen in the limiting case where (in the diagram in my previous comment) $P$ and $Q$ are on the $x$-axis at the points $\pm1$. But...
For a simple power series $\sum a_nx^n$ the radius of convergence is given by $\frac1R = \lim_{n\to\infty}\Bigl|\frac{a_{n+1}}{a_n}\Bigr|$ (provided...