The value of ∫−π2π2cos2x1+2−x dx \int_{-\frac{\pi}{2}}^{\frac{\pi}{2}} \frac{\cos^2 x}{1 + 2^{-x}} \, dx ∫−2π2π1+2−xcos2xdx is equal to:
Given the Linear Programming Problem: Maximize z=11x+7y z = 11x + 7y z=11x+7y subject to the constraints: x≤3 x \leq 3 x≤3, y≤2 y \leq 2 y≤2, x,y≥0 x, y \geq 0 x,y≥0. Then the optimal solution of the problem is: