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有很多问题需要逆用等差、等比数列的求和公式来解决问题.(一)逆用等差数列的求和公式例1已知数列{a_n}满足a_1=1,a_(n+1)=2a_n+1(n∈N~*) (Ⅰ)求数列{a_n}的通项公式;
There are many problems that need to be solved by summing the equations of equal and odd progressions. (1) Summation Formulas for Inverse Arithmetic Sequences Example 1 Known sequence {a_n} satisfies a_1=1, a_(n+1) )=2a_n+1(n∈N~*) (I) Find the general term formula of the series {a_n};