Evaluate below equation.
Evaluate the infinite series:
1/2! + 2/3! + 3/4! + …
Evaluate the following integral, and use the result to prove that π is less than 22/7.
If the medians of triangle ABC intersect at P , then evaluate
AB^2+AC^2+BC^2 ---------------- PA^2+PB^2+PC^2
For the equation below, find the value of k for which the equation has numerically equal but opposite signs (for example, 2 and -2)