# if   (where '!' denotes factorial)Then x is equal to - Option 1) 100 Option 2) 90 Option 3) 170 Option 4) None of these

As we learnt in

Factorial Notation -

The product of first n natural numbers. n! = n(n - 1) (n - 2) ..........3 . 2 . 1

- wherein

Where

Option 1)

100

Correct

Option 2)

90

Incorrect

Option 3)

170

Incorrect

Option 4)

None of these

Incorrect

Boost your Preparation for JEE Main 2021 with Personlized Coaching

Exams
Articles
Questions