Category: Miscel

Is  ?

The answer is no. Correct answer is 

See the following example how this concept is applied in H2 math

Example 1

Differentiate  with respect to x

Therefore

Ans: -1 if sin x > 0, 1 if sin x < 0

Example 2

Questions on factorial can appear in H2 math binomial expansion, partial fractions, method of difference, mathematical induction and probability. Knowing how to simplify and manipulate factorials are crucial to doing well.

Two commonly used techniques

1. Replace n! with n(n-1)!

2. Multiply by k/k  or k! / k!

Example 1