孫跟春??
求參數(shù)范圍問(wèn)題在高中數(shù)學(xué)中經(jīng)常出現(xiàn),其中有一類是關(guān)于函數(shù)與方程的問(wèn)題,這類問(wèn)題出現(xiàn)的頻率高、難度大.這一類問(wèn)題解決的通法是:利用函數(shù)與方程思想,把方程問(wèn)題轉(zhuǎn)化為函數(shù)問(wèn)題或者把函數(shù)問(wèn)題轉(zhuǎn)化為方程問(wèn)題.下面舉例說(shuō)明.
一、把方程根的問(wèn)題轉(zhuǎn)化為兩個(gè)函數(shù)圖象交點(diǎn)的問(wèn)題
求參數(shù)范圍問(wèn)題在高中數(shù)學(xué)中經(jīng)常出現(xiàn),其中有一類是關(guān)于函數(shù)與方程的問(wèn)題,這類問(wèn)題出現(xiàn)的頻率高、難度大.這一類問(wèn)題解決的通法是:利用函數(shù)與方程思想,把方程問(wèn)題轉(zhuǎn)化為函數(shù)問(wèn)題或者把函數(shù)問(wèn)題轉(zhuǎn)化為方程問(wèn)題.下面舉例說(shuō)明.
一、把方程根的問(wèn)題轉(zhuǎn)化為兩個(gè)函數(shù)圖象交點(diǎn)的問(wèn)題
求參數(shù)范圍問(wèn)題在高中數(shù)學(xué)中經(jīng)常出現(xiàn),其中有一類是關(guān)于函數(shù)與方程的問(wèn)題,這類問(wèn)題出現(xiàn)的頻率高、難度大.這一類問(wèn)題解決的通法是:利用函數(shù)與方程思想,把方程問(wèn)題轉(zhuǎn)化為函數(shù)問(wèn)題或者把函數(shù)問(wèn)題轉(zhuǎn)化為方程問(wèn)題.下面舉例說(shuō)明.
一、把方程根的問(wèn)題轉(zhuǎn)化為兩個(gè)函數(shù)圖象交點(diǎn)的問(wèn)題