(3/4a^n+1-1/2b^n)*2ab-(2/3a^n+1-5/6b^n)*3abn+1和n都是指数

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(3/4a^n+1-1/2b^n)*2ab-(2/3a^n+1-5/6b^n)*3abn+1和n都是指数

(3/4a^n+1-1/2b^n)*2ab-(2/3a^n+1-5/6b^n)*3abn+1和n都是指数
(3/4a^n+1-1/2b^n)*2ab-(2/3a^n+1-5/6b^n)*3ab
n+1和n都是指数

(3/4a^n+1-1/2b^n)*2ab-(2/3a^n+1-5/6b^n)*3abn+1和n都是指数
=[(6/4a^n+1)-1/b^n-(3/3a^n+1)+5/2b^n]*ab
=[(18a^n+6-12a^n-3)/(4^an+1)*(3a^n+1)+3/2b^n]*ab
=[(6a^n+3)/(4a^n+1)*(3a^n+1)+3/2b^n]*ab