Advent Wreath Candles. Set on the branches of the wreath are four candles: three purple candles and one pink candle. In the center of the wreath sits a white candle. As a whole, these candles represent the coming of the light of Christ into the world. On the first Sunday of Advent, the first purple candle is lit.
In mathematics,  a coefficient is a multiplicative factor in some term of a polynomial, a series or any expression; it is usually a number, but may be any expression. In the latter case, the variables appearing in the coefficients are often called parameters, and must be clearly distinguished from the other variables.
The leading coefficient of a polynomial is the coefficient of the leading term. In this case, the leading coefficient is . A polynomial consists of terms, which are also known as monomials. The leading term in a polynomial is the highest degree term. In this case, the leading term in is the first term, which is . The leading coefficient in a polynomial is the coefficient of the leading term. In this case, the leading term is and the leading coefficient is . The polynomial degree is , the leading term is , and the leading coefficient is .