what expression does not name an integer
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Not necessarily. If the exponent is not an integer then it is not a polynomial.
Not necessarily. Every exponent in the exponent must be a non-negative integer. This is not what you have specified. For example, if n = 3.5, it is not a term in a polynomial expression.
a^(-n) = (1/a)^nIf a is 0, the above expression would require division by 0, which is not defined.
It is an expression that has some letters or symbols which can take a different values.
The exponential expression a^n is read a to the nth power. In this expression, a is the base and n is the exponent. The number represented by a^n is called the nth power of a.When n is a positive integer, you can interpret a^n as a^n = a x a x ... x a (n factors).