The system of linear equations $$\left. {\matrix{ {4x + 2y = 7} \cr {2x + y = 6} \cr } } \right\}$$ has

The residue of the function
$$f(z) = {1 \over {{{\left( {z + 2} \right)}^2}{{\left( {z - 2} \right)}^2}}}$$ at z = 2 is

The equation sin(z) = 10 has

The recursion relation to solve $$x = {e^{ - x}}$$ using Newton $$-$$ Raphson method is