(1).(2+3)/6+(2^2+3^3)/6+……+(2^n+3^n)/6^n(2).1+(1+1/2)+(1+1/2+1/4)+……+(1+1/2+1/4+……+1/2^{n-1})(3) 0.5+0.55+0.555+……+0.55…55(n个5)Key:(1) 3/2-1/2^n -1/2*3^n(2)2n+1/2^(n-1)-2(3) 5/81(10^{-n}+9n-1)其实我基本都会
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(1).(2+3)/6+(2^2+3^3)/6+……+(2^n+3^n)/6^n(2).1+(1+1/2)+(1+1/2+1/4)+……+(1+1/2+1/4+……+1/2^{n-1})(3)0.5+
(1).(2+3)/6+(2^2+3^3)/6+……+(2^n+3^n)/6^n(2).1+(1+1/2)+(1+1/2+1/4)+……+(1+1/2+1/4+……+1/2^{n-1})(3) 0.5+0.55+0.555+……+0.55…55(n个5)Key:(1) 3/2-1/2^n -1/2*3^n(2)2n+1/2^(n-1)-2(3) 5/81(10^{-n}+9n-1)其实我基本都会
(1).(2+3)/6+(2^2+3^3)/6+……+(2^n+3^n)/6^n
(2).1+(1+1/2)+(1+1/2+1/4)+……+(1+1/2+1/4+……+1/2^{n-1})
(3) 0.5+0.55+0.555+……+0.55…55(n个5)
Key:
(1) 3/2-1/2^n -1/2*3^n
(2)2n+1/2^(n-1)-2
(3) 5/81(10^{-n}+9n-1)
其实我基本都会做.但就是化简不了跟答案一样呀!
(1).(2+3)/6+(2^2+3^3)/6+……+(2^n+3^n)/6^n(2).1+(1+1/2)+(1+1/2+1/4)+……+(1+1/2+1/4+……+1/2^{n-1})(3) 0.5+0.55+0.555+……+0.55…55(n个5)Key:(1) 3/2-1/2^n -1/2*3^n(2)2n+1/2^(n-1)-2(3) 5/81(10^{-n}+9n-1)其实我基本都会
好好学习呀 小朋友
小学五年级数学单元测试小结
2/3,1,6/5,4/3,( ),3/2
2/3,1/3,2/9,1/6,)
-1/2+(-1/6)-(-1/4)-2/3
(-2)-(+2/3)=?-2/3-(-1/6)=?(-1/2)-1/3=?
简算 (1.5+2/3)/1/6-2/3
(1/6-2/3+3/7)*(-42)计算、
(1/6-2/3+3/7)*(-42)计算
6-5×(-1/2)3次方
1, 2, 3, 6, 7, 14, ( )
1, 2, 3, 6, 7, 14, ( )
6/3(2+1)=?
(-2/3)+0.25-1/6-0.5
2(3^2+1)(3^4+1)(3^6+1)(3^8+1)要简算
1/6(3×-6)=2/5x-3
1/2-(3/4-3/8),1/2+1/4-1/6 ,2/3+(1/2+1/4),1/2-(3/4-3/8),1/2+1/4-1/6 ,2/3+(1/2+1/4),
1/2-(3/4-3/8), 1/2+1/4-1/6 , 2/3+(1/2+1/4),1/2-(3/4-3/8), 1/2+1/4-1/6 , 2/3+(1/2+1/4),
1/2-(3/4-3/8),1/2+1/4-1/6 ,2/3+(1/2+1/4),1/2-(3/4-3/8),1/2+1/4-1/6 ,2/3+(1/2+1/4),
(运用拆项法):(-2011 5/6)+(-2010 2/3)+4022 2/3+(-3 1/2)