If 1/7!+1/8!=x/9! , then find the value of x
Answers
Answered by
16
Factorial notation
The notation represents the product or first natural numbers, i.e., the product is denoted as .
We read symbol as 'n factorial'.
Thus,
and so on.
We can write,
Solution:
We are asked to solve for x of the following equation:
We can write as . And as .
Hence, the value of x is 81.
Answered by
2
Answer :
- Value of x is 81
Given :
- If 1/7! + 1/8! = x/9!
To find :
- Value of x
Solution :
Given
- 1/7! + 1/8! = x/9!
↝ 1/7! + 1/8! = x/9!
↝ 9!(1/7! + 1/7!) = x
↝ 9!/7! + 9!/8! = x
↝ 9 × 8 × 7! / 7! + 9 × 8! / 8! = x
↝ 9 × 8 + 9 = x
↝ 72 + 9 = x
↝ 81 = x
↝ x = 81
Hence , Value of x is 81.
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