找规律 6.25 2.5 1 ( ) ( ) 0.064 7 3.5 1.75 ( ) ( ) 0.21875 11x22+0.22x3300+330x4.4

问题描述:

找规律 6.25 2.5 1 ( ) ( ) 0.064 7 3.5 1.75 ( ) ( ) 0.21875 11x22+0.22x3300+330x4.4

6.25 2.5 1 (0.4)(0.16 ) 0.064规律为:第n+1项为第n项/2.57 3.5 1.75 (0.875 ) (0.4375 ) 0.21875 规律为:第n+1项为第n项/2 11x22+0.22x3300+330x4.4=(1*2+2*3+3*4)*11*11=2420...