# 高中数学第2章指数函数、对数函数和幂函数21指数函数命题与探究素材湘教版1.

2.1 指数函数

4 2 3

;
1

(2)(2

3 0 -2 1 ? 0.5 ) +2 ·(2 ) 2 -(0.01) . 5 4

2 4 2 3

= 9 ? (9 ) = 9 ? ? 9 ? (9 ) ? 9
2

4

2 3

1 2

4

2

1 3

4

7 3

7 1 3 4

7 12

?3 .

7 6

4

81? 9 3 = 4 81?
1

3

81 ? 4 6 817 ? 4 81? 6 81 ? 24 328 ? 6 37 ? 36 3.

3 0 -2 1 ? 0.5 (2)解:(2 ) +2 ·(2 ) 2 -(0.01) 5 4 1 4 1 2 =1+ ×( ) 2 -( ) 4 9 100
1 1

1

=1+

1 2 1 16 ? . × 4 3 10 15
x x

)

1 1 ,n= 的草图(如图 2-1-4 所示),则见 m 在左上方,n 对应的图象在右下方,对应的选 3 2

2

-0.1 -0.2

3

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