问题 填空题

设偶函数f(x)=loga|x+b|在(0,+∞)上单调递增,则f(b-2)______f(a+1)(填等号或不等号)

答案

f(x)=loga|x+b|是偶函数,

所以f(-x)=loga|-x+b|=f(x)=loga|x+b|,

所以|-x+b|=|x+b|,所以b=0.

所以f(x)=loga|x+b|=loga|x|,

因为函数f(x)在(0,+∞)上单调递增,所以a>1,所以a+1>2

因为f(b-2)=f(-2)=f(2),所以f(a+1)>f(2)=f(-2).

故答案为<.

改错题

短文改错:(共10小题,每小题1分,满分10分)

此题要求改正所给短文中的错误。对标有题号的每一行作出判断:如无错误,在该行右边横线上画一个(√);如有错误(每行只有一个错误),则按下列情况改正:

此行多一词:把多余的词用斜线(/)划掉,在该行右边横线上写上该词,并也用斜线划掉。

此行缺一词:在缺词处加一个漏字符(^),在该行右边横线上写上该加的词。

此行错一词:在错的词下划一横线,在该行右边横线上写出改正后的词。

注意:原行没有错的请不要改。

Mrs Hunt’s sister said she is coming to see her              小题1:           

with his daughter. Mrs Hunt was happy                     小题2:           

because she has not seen her sisiter for months,. She knew      小题3:           

the girl liked bananas, and she was busy in the kitchen       小题4:           

and couldn’t go out. She gave any money                  小题5:            

to her son Bruce and said, “Go and buy two kilos bananas.”    小题6:            

Bruce liked bananas, either. Thirty minutes                 小题7:           

late he came back with the bananas. Mrs Hunt weighed       小题8:           

the bananas. And found they were half a kilo short. She took   小题9:           

out the bag to the shopkeeper and said, “I sent my little son   小题10:           

for two kilos of bananas, but you give him only one and a half kilos!”

“Have you weighed your little son, Madam?” asked the shopkeeper.”

多项选择题