Let f (x) = x / {x + 7}. Find the value of x where f' (x) = 6...
\cos(\arctan(-\frac{1}{2})) Find the approximation, accurate to two decimal places: lim_{x to -1} (2x^2 + 7x + 5) / (x + 1). Use a calculator to find a decimal approximation for each value. csc(-154^{\circ} 19') (a) ...