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标题: IR-OG-44 求解释 [打印本页]

作者: xincijiang 时间: 2013-7-18 01:28
标题: IR-OG-44 求解释

7. A car is travelling on a straightstretch of roadway. Andthe speed of the car is increasing at a constant rate. At time 0 seconds, thespeed of the car is v0 meters per second; 10 seconds later, thefront bumper of the car has traveled 125 meters and the speed of the car is v10meters per second.

Inthe table, selectvalues of v0and v10 that are together consistent with the information provided. Make only two selections, one in eachcolumn.

	V0	V10
A			5
B			18
C			20
D			36
E			72

作者: 妞妞洁 时间: 2013-8-11 21:41
求好心人解释为什么V均=（V0+V10）/2 ？多谢了

作者: 妞妞洁 时间: 2013-8-11 21:54
已自解等差数列

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