Question

writing in the form of power of 3

Answer 1

Example : 3x3x3  Is one way you can write it Or you could do 3^3 were your second 3 is your exponent.
Hope this helps

Answer 2

Writing in the form of power of 3 can be wrote a lot of ways. Any number to the power of 3 van also be read as the number to the power of 3, or the number cubed. Lets do some examples:-

3³ = 3 × 3 × 3 = 27
3³ = 27
3³ = three cubed = three to the power of 3 

5³ = 5 × 5 × 5 = 125
5³ = 125
5³ = five cubed = five to the power of 3

(These  are just 2 examples. There are MANY more.)
Hope I helped ya!!