# Trailing coefficient degree of a polynomial: tcoeff

### 5.27.11 Trailing coefficient degree of a polynomial: tcoeff

The tcoeff command finds the trailing coefficient of a polynomial; that is, the coefficient of the monomial of lowest degree.

- tcoeff takes one mandatory argument and one optional argument:
  - P, a polynomial given by a symbolic expression or by its list of coefficients.
  - Optionally x, a variable name (by default x).
- tcoeff(P ⟨,x⟩) returns the trailing coefficient of P.

#### Examples.

- Input:
  tcoeff([2,1,-1,0])
  Output:

  −1

- Input:
  tcoeff(3*x^2+5*x,x)
  Output:

  5

- Input:
  tcoeff(3*x^2+5*x*y^2,y)
  Output:

  3 x2