Numbers expressed using exponents are called base :)
3/5 cannot be simplified into a smaller fraction.
As written, it is interpreted to mean 14·22·350·x = 107800x.
_____
Often such an expression written here on Brainly is expected to be interpreted as an exponential expression: 
This is NOT an arithmetic sequence because there is no common difference. It is a geometric sequence because there is a common ratio. Meaning that each term is a constant ratio or multiple of the previous term. The recursive rule for this geometric sequence is:
a(n)=3*a(n-1), a(1)=3