若|a+3|+(b﹣2)2=0,则ab的值为( )
A:-9
B:9
C:-8
D:8
①f(x)=ln 1−x1+x ,②g(x)= 12 (ex+e﹣x),③h(x)=lg( 1+x2 ﹣x),④m(x)= 12x−1 + 12 .
方程x2+3x﹣1=0的根可看作是函数y=x+3的图象与函数y=1x的图象交点的横坐标,那么用此方法可推断出方程x3﹣x﹣1=0的实数根x0所在的范围是( )
—Oh, my God! It's really heavy. I can't imagine how big it is! Is it an adult elephant?