定義一個(gè)對(duì)應(yīng)法則：.現(xiàn)有點(diǎn)與，點(diǎn)是線段上一動(dòng)點(diǎn)，按定義的對(duì)應(yīng)法則：。當(dāng)點(diǎn)在線段上從點(diǎn)開始運(yùn)動(dòng)到點(diǎn)結(jié)束時(shí)，點(diǎn)的對(duì)應(yīng)點(diǎn)所經(jīng)過的路線長(zhǎng)度為______.

定義一個(gè)對(duì)應(yīng)法則，現(xiàn)有點(diǎn)與點(diǎn)，點(diǎn)是線段上一動(dòng)點(diǎn)，按定義的對(duì)應(yīng)法則.當(dāng)點(diǎn)在線段上從點(diǎn)開始運(yùn)動(dòng)到點(diǎn)結(jié)束時(shí)，點(diǎn)的對(duì)應(yīng)點(diǎn)所經(jīng)過的路線長(zhǎng)度為         ．

定義一個(gè)對(duì)應(yīng)法則，現(xiàn)有點(diǎn)與點(diǎn)，點(diǎn)是線段上一動(dòng)點(diǎn)，按定義的對(duì)應(yīng)法則.當(dāng)點(diǎn)在線段上從點(diǎn)開始運(yùn)動(dòng)到點(diǎn)結(jié)束時(shí)，點(diǎn)的對(duì)應(yīng)點(diǎn)所經(jīng)過的路線長(zhǎng)度為______.