找规律 6.25 2.5 1 ( ) ( ) 0.064 7 3.5 1.75 ( ) ( ) 0.21875 11x22+0.22x3300+330x4.4
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找规律 6.25 2.5 1 ( ) ( ) 0.064 7 3.5 1.75 ( ) ( ) 0.21875 11x22+0.22x3300+330x4.4
找规律 6.25 2.5 1 ( ) ( ) 0.064 7 3.5 1.75 ( ) ( ) 0.21875 11x22+0.22x3300+330x4.4
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/2.5
7 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
6.25 2.5 1 (0.4 ) ( 0.16) 0.064
7 3.5 1.75 (0.875 ) (0.4375 ) 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/2.5
7 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
1/2.5=0.4,0.4/2.5=0.16
1.75/2=0.875,0.875/2=0.4375
11x22+0.22x3300+330x4.4 =2420