Question

三個(gè)數(shù)7^0.3，0.3⁷，ln0.3的大小關(guān)系是    ．

Answer 1

【答案】分析：根據(jù)指數(shù)函數(shù)的性質(zhì)判斷兩指數(shù)形式數(shù)的范圍，再根據(jù)對(duì)數(shù)函數(shù)的性質(zhì)判斷l(xiāng)n0.3的范圍．
解答：解：根據(jù)指數(shù)函數(shù)的性質(zhì)，7^0.3＞1；0＜0.3⁷＜1；
根據(jù)對(duì)數(shù)函數(shù)的性質(zhì)，ln0.3＜0．
故答案是7^0.3＞0.3⁷＞ln0.3
點(diǎn)評(píng)：本題考查不等式比較大小及指數(shù)，對(duì)數(shù)函數(shù)的圖象性質(zhì)．