a^3-a^2b-b^3中項數和次數分別是什麼,3n^4-2n^2+1呢?

a^3-a^2b-b^3中項數和次數分別是什麼,3n^4-2n^2+1呢?

a^3-a^2b-b^3中項數=3, 次數=3次,
3n^4-2n^2+1中項數=3, 次數=4次,