19n^2-98n-m=m,
19n^2-98n=2m
2m+2n=19n^2-98n+2n=19n^2-96n>0
y=19n^2-96n>0
n96/19>5
n5>48/19
且n>48/19是y单调递增
所以n=6时y有最小值108
2m+2n最小值=108
所以m+n最小值=54
19n^2-98n-m=m,
19n^2-98n=2m
2m+2n=19n^2-98n+2n=19n^2-96n>0
y=19n^2-96n>0
n96/19>5
n5>48/19
且n>48/19是y单调递增
所以n=6时y有最小值108
2m+2n最小值=108
所以m+n最小值=54