Value of x:
To find the value of x, we are given that x = 3 √5. This means that x is equal to 3 times the square root of 5.

Calculating the value of x:
We can simplify the expression by evaluating the square root of 5. The square root of 5 is an irrational number, which means it cannot be expressed as a fraction and its decimal representation goes on forever without repeating.

Using a calculator, we can find that the approximate value of √5 is 2.236. Therefore, x = 3 * 2.236 = 6.708.

So, the value of x is approximately 6.708.

Calculating 1/x:
Now, we need to find the value of 1/x. To do this, we divide 1 by the value of x.

1/x = 1/6.708

Using a calculator, we can evaluate this expression to find that the approximate value of 1/x is 0.149.

So, the value of 1/x is approximately 0.149.

Summary:
- The value of x is 6.708.
- The value of 1/x is 0.149.