代数式<img src="https://nimg.ppkao.com/2017-09/jiangyouai/2017090809234843678.jpg?sign=f753a8d473c0054636ebb91a15e09871&t=62d06852" />对应的VB表达式是()。
A、a-b/c*d
B、a-b/(c*d)
C、(a-b)/(c*d)
D、(a-b)/c*d
A、a-b/c*d
B、a-b/(c*d)
C、(a-b)/(c*d)
D、(a-b)/c*d
A、数值积分公式<img src="https://img.ppkao.com/2019-05/wanxiaokui/2019051614371537315.jpg" />的代数精度为()。
A、在牛顿-柯特斯求积公式:<img src="https://img.ppkao.com/2019-05/wanxiaokui/2019051614474078173.jpg" />中,当系数<img src="https://img.ppkao.com/2019-05/wanxiaokui/2019051614472994714.jpg" />是负值时,公式的稳定性不能保证,所以实际应用中,当()时的牛顿-柯特斯求积公式不使用。
A、A.<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309154866509.jpg" />低电平,<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309155838776.jpg" />三态,<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309155342124.jpg" />低电平
B.<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309154866509.jpg" />三态,<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309155838776.jpg" />低电平,<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309155342124.jpg" />高电平
C.<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309154866509.jpg" />低电平,<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309155838776.jpg" />高电平,<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309155342124.jpg" />高电平
D.<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309154866509.jpg" />高电平,<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309155838776.jpg" />低电平,<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309155342124.jpg" />高电平