Recent content by liuhongwei

Thanks for your advise

Thank you. but "y as a function of x ",3 and 4 has none x

The #4, k=0?

My classmates and I have a big dispute on this question. I think only the first one is right, and they think the third one and the fourth one are right. Please help us to analyze it. Thank you. The original title is as follows ： Which of the following expressions represents y as a function...

你能帮助我吗 ？ 问：以下哪个表达式表示y是X的函数？ ①2y + x = 3; ②y = x + 2z; ③y = 2；④y = kx + 1（k为常数。）；⑤y²= x

I'm a techer. Thanks for your help! I have just joined this wonderful community. I do my best to learn math and other sciences on my own. Rather difficult thing to do, but I do hope to cope with this interesting task. I will be asking questions hoping to get help. :) Thank you! Best wishes!