4.m+6 2/3m 5.357 857 6.3.45 7.122百分号a 85百分号(122百分号a) 85百分号(122百分号a)-a 8.2n+1 2n+-1 9.3 6 10 15 10.17a 20a (3n+2 )a 11.3n-3 4.m+6 2/3m 5.357 857 6.3.45 7.122百分号a 85百分号(122百分号a) 85百分号(122百分号a)-a 8.2n+1 2n+-1 9.3 6 10 15 10.17a 20a (3n+2 )a 11.3n-3