1.before being simplified, the instruction of computing income tax in R country, were to add 2% of one’s annual income to the average of 100 units of R’s currency and 1% of one’s annual income which of the following represented the simplificated formula for computing the increase tax in R’s currency for a person in that country whose income is I key: 50+I/40 2. in the arithmetic sequence t1,t2 ,……tn ,….. t1=23,and tn= t(n-1)-3 for each n>1 what is the value of n-3 for each n>1 what is the value of n -3 for each n>1 what is the value of n t(n-1)-3 for each n>1 what is the value of n key n=10 两道题够不知道怎么算出来的,第一题意思不懂 ,第二题的公式是什么,因为前面题t1,t2 既不是加也不是减,更不是成 |