基数20000,年递增5% 一年后的房租 = 20000 (1 + 5%) 二年后的房租 =一年后的房租再增5% = 20000 (1 + 5%) x (1 + 5%) = 20000 x (1 + 5%)^2 如此类推,20年后的房租 = 20000 x (1+5%)^20 = 53065.95