3^3-4×3^2+10×3=213^4-4×3^3+10×3^2=633^5-4×3^4+10×3^3=1893^2004-4×_数学解答

3^3-4×3^2+10×3=21
3^4-4×3^3+10×3^2=63
3^5-4×3^4+10×3^3=189
3^2004-4×3^2003+10×3^2002=______
3^n+2 - 4×3^3n+1 + 10×3^n=______

人气：339 ℃　时间：2020-03-29 06:27:50

解答

3^2004-4×3^2003+10×3^2002=7×3^2002
3^n+2 - 4×3^3n+1 + 10×3^n=7×3^n