1+(1*0.5)=1.5 1.5+(1.5*0.5)=2.25 2.25+(2.25*0.5)=3.375.以此类推.
3个回答
A(n)表示第n项
递推: A(n+1)=1.5*A(n) A(1)=1
表达式: A(n)=(1.5)^(n-1)
相关问题
(1又1/2-0.375)/〔1/25*(2/5+2.1)〕
0.5+1+1.5+2.5+3+……+25.5=?
1.(5.75-4.75)/[2.5+(0.75*1.25*8) 2.(6.9*3.6*3.5)/(1.25/0.25)
-﹙﹣4.5﹚÷﹙1/2-0.25﹚²-3.5÷│﹣0.25│²=
(1)-6-[3/25-(-4/5)^2]*(-5)^3 (2)-0.25除以(-1/2)^3+(1/8-1/2)*(-
0.25 1.25 25 2.5 2.05(
口算:(1)0.1×0.1=(2)0.24×0.5=(3)5.4+3.6=(4)1.25-0.25=(5)6.45×0.
0.8÷(5/4×1.25)÷(0.64-1/25)+1.2×0.5÷4/5
(1) 1/4√256+√0.25 (2) 2√2+3√5-3√2-3√5 (3) √(﹣2/5)²-√1-(