Question

Is $3a+4b-6c+\frac{7}{d}$ polynomial?

Answer 1

The given expression is $3a+4b-6c+\frac{7}{d}$ .

We know that the polynomial an expression in which the term has non negative exponent is called a polynomial.

But one of the terms of the expression has a negative exponent which is $\frac{7}{d}=7d^{-1}$

Hence, the given expression is not a polynomial.