已知幂函数f(x)=xα的图象过点( 12 , 22 ),则α=____ .
Thanks to the a____ technology, we live in an age of bettered communication.
已知函数fx=sinπ3-x,则要得到其导函数y=f'x的图象,只需将函数y=fx的图象上所有的点( )