Given a,b,c satisfy c<b<a and ac<0,then which one is not sure to be correct in the following inequalities?( ) (英汉词典:besureto确定;correct正确的;inequality不等式)
As in figure 2.In the circular ring of which center is point O.if AO⊥BO,and the area of the shadowy part is 25cm2,then the area of the circuiar ring equals to( ) (π≈3.14)
For real number a,let[a]denote the maximum integer which does not exceed a.For example,[3.1]=3,[-1.5]=-2,[0.7]=0 Now let f(x)=(x+1)/(x-1),then[f(2)]+[f(3)]+…+[f(100)]=
.(英汉小词典real number:实数;the maximum integer which does not exceed a:不超过a的最大整数)