等差数列计算交互练习
2020-04-22 06:24
本范例是一个等差数列计算的交互式练习工具。通过 RandomElement 和 Shuffle 命令随机生成等差数列的首项与公差，利用 Sequence 命令生成数列各项。学生需在输入框中填写数列的后续项（a1 至 a5），并通过按钮提交答案进行自动校验（checka1 至 checka5）。该练习帮助学生巩固等差数列通项公式的理解与计算能力，支持反复随机出题，适合课堂练习与自主复习使用。
所属专题
中职数学GeoGebra互动教学资源库
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firsta=RandomElement(a1List)
d=RandomElement(dList)
showList=Shuffle({0,0,0,1,1})
SetValue(a1,If(Element(showList,1)==0,?,Element(numList,1)))
SetValue(a2,If(Element(showList,2)==0,?,Element(numList,2)))
SetValue(a3,If(Element(showList,3)==0,?,Element(numList,3)))
SetValue(a4,If(Element(showList,4)==0,?,Element(numList,4)))
SetValue(a5,If(Element(showList,5)==0,?,Element(numList,5)))
SetColor(IBa1,If(Element(showList,1)==0,"black","red"))
SetColor(IBa2,If(Element(showList,2)==0,"black","red"))
SetColor(IBa3,If(Element(showList,3)==0,"black","red"))
SetColor(IBa4,If(Element(showList,4)==0,"black","red"))
SetColor(IBa5,If(Element(showList,5)==0,"black","red"))
SetValue(checka1,If(Element(showList,1)==0,false,true))
SetValue(checka2,If(Element(showList,2)==0,false,true))
SetValue(checka3,If(Element(showList,3)==0,false,true))
SetValue(checka4,If(Element(showList,4)==0,false,true))
SetValue(checka5,If(Element(showList,5)==0,false,true))"/>
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<input a0="firsta + ((n - 1) * d)" a1="n" a2="1" a3="5"/>
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SetValue(textd1,If(a1==Element(numList,1),"√","×"))
SetValue(textd2,If(a2==Element(numList,2),"√","×"))
SetValue(textd3,If(a3==Element(numList,3),"√","×"))
SetValue(textd4,If(a4==Element(numList,4),"√","×"))
SetValue(textd5,If(a5==Element(numList,5),"√","×"))

SetValue(checka1,If(a1==Element(numList,1),true,false))
SetValue(checka2,If(a2==Element(numList,2),true,false))
SetValue(checka3,If(a3==Element(numList,3),true,false))
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<auxiliary val="true"/>
<font serif="false" sizeM="4" size="36" style="0"/>
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<textAlign val="center"/>
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<input a0="a5"/>
<output a0="IBa5"/>
</command>
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<textAlign val="center"/>
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<checkbox fixed="true"/>
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<condition showObject="isCheck ∧ Element[showList, 5] ≟ 0"/>
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