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:2024/11/28 08:47:07
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
x){nNj5[|ÚS[vzz Hm +h{l绻ZbfQfv6cdkrK:_,ld5eSsC#Z^7>x޹O7 2aYR6IE; t>ٱɎUO{6uó;Mlamlhnak ei@M u< % f雀ٕچ/&=m/.H̳W

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