同济7版高数上册必做题P16:6P26:1,2.P33:3.P38:6,7,P45:1,2,3,4,5P52:1,2P55:1,2,3,5P61:3,4P66:3,4,5,6P70:2,3,5P71:2,3P72:9,10,11,12,13...