已知多項(xiàng)式-

5

6

x2ym+2+xy2-

1

2

x3+6是六次四項(xiàng)式，單項(xiàng)式

2

3

x3ny5-mz的次數(shù)與這個(gè)多項(xiàng)式的次數(shù)相同，求n的值．

已知多項(xiàng)式-

1

5

x²y^m+1+2xy²-3x³-4是六次四項(xiàng)式，而單項(xiàng)式26x²ⁿy^5-m的次數(shù)與這個(gè)多項(xiàng)式的次數(shù)相同，求n的值．