宸茬煡鍏充簬x镄勪竴鍏冧簩娆℃柟绋媥虏-(1+2k)x+k虏-2=0链変袱涓疄鏁版牴锛屼竴娆″嚱鏁
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/05 17:34:33
![宸茬煡鍏充簬x镄勪竴鍏冧簩娆℃柟绋媥虏-(1+2k)x+k虏-2=0链変袱涓疄鏁版牴锛屼竴娆″嚱鏁](/uploads/image/z/15203306-2-6.jpg?t=%E5%AE%B8%E8%8C%AC%E7%85%A1%E9%8D%8F%E5%85%85%E7%B0%ACx%E9%95%84%E5%8B%AA%E7%AB%B4%E9%8D%8F%E5%86%A7%E7%B0%A9%E5%A8%86%E2%84%83%E6%9F%9F%E7%BB%8B%E5%AA%A5%E8%99%8F-%281%2B2k%29x%2Bk%E8%99%8F-2%3D0%E9%93%BE%E5%A4%89%E8%A2%B1%E6%B6%93%26%2357412%3B%E7%96%84%E9%8F%81%E7%89%88%E7%89%B4%E9%94%9B%E5%B1%BC%E7%AB%B4%E5%A8%86%E2%80%B3%E5%9A%B1%E9%8F%81)
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宸茬煡鍏充簬x镄勪竴鍏冧簩娆℃柟绋媥虏-(1+2k)x+k虏-2=0链変袱涓疄鏁版牴锛屼竴娆″嚱鏁
宸茬煡鍏充簬x镄勪竴鍏冧簩娆℃柟绋媥虏-(1+2k)x+k虏-2=0链変袱涓疄鏁版牴锛屼竴娆″嚱鏁
宸茬煡鍏充簬x镄勪竴鍏冧簩娆℃柟绋媥虏-(1+2k)x+k虏-2=0链変袱涓疄鏁版牴锛屼竴娆″嚱鏁
有两个实数根.△=(2k+1)²-4(k²-2)>=0
4k²+4k+1-4k²+8>=0
4k>=-9
k>=-9/4
y=kx+1递减,K