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

Find the value of \”a\” by solving the maths equation in the picture below: