用R程序编程求下列的值,正确的命令是 ( )[img=70x33]180398c76023edd.png[/img]
A: 27^2/3-log(2)/log(3)
B: 27^(2/3-log(3))
C: 27^(2/3-log3(2))
D: 27^(2/3-log(2)/log(3))
A: 27^2/3-log(2)/log(3)
B: 27^(2/3-log(3))
C: 27^(2/3-log3(2))
D: 27^(2/3-log(2)/log(3))
举一反三
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- 求不定积分[img=121x54]17da653839aa6ae.png[/img]; ( ) A: log(x^2 + 3*x + 25/4)/4 + (5*atan(x/2 + 3/4))/4 B: log(x^2 + 3*x + 25/4)/4 C: (5*atan(x/2 + 3/4))/4 D: log(x^2 + 3*x + 25/4)/4 - (5*atan(x/2 + 3/4))/4
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- 17da426f4cb2265.jpg,计算[img=23x22]17da426f58ddf0c.jpg[/img]实验命令为( ). A: f=diff(log(x),3)f=2/x^3 B: syms x; f=diff(log(x),3)f=2/x^3 C: syms x;f=diff(logx,3)f=2/x^3