第4题a=____b=____

第4题a=____b=____ 若f（x）=ax²+bx+3a+b是偶函数,且定义域为[a-1,2a],则a=____b=____ 高数 导数 函数设f(x+1)-f(x)=8x+3,则f(x)=ax^2+bx+5中的a=____b=____ 如果2X的2a-b-1次方-3y的3a-2b+16次方=10是一个两元一次方程,那么a=____b=____ 判别式和根与系数.1 、已知方程x²+ax+b=0的两个根分别是2与3,则a=____b=____2、已知方程 Li Ming often gose to school by bus.Li Ming often ____ ____b 补全对话（5×1’）A: Where do you live?B: __小题1:__A: __小题2:____B: I A:Good moming.1____B:Yes,I want a shirt for my son. I have got a stomachache.=____ ____ ____ ____ with my stomac 质点做匀变速直线运动,第2s和第7s内位移分别为2.4m和3.4m,则其运动加速度a=____ have a good time=have fun=____ ____? go there by plane =____ a plane____ ____ there