2. 1* 1. 15 12 power +0. 1 * 11power. 2000 yuan is the same.
3. Let's assume X years, that is, the power of1*12x+0.2 *1.15 (12x-/kloc-
) Power +...+0.2 * 1. 15 is equal to 100, but I wonder if there is any special method for this calculation in senior high school. Is the computer allowed, or are both sides multiplied by 1. 15, and then the original equation is subtracted?