问题
解答题
计算: (1)
(2)
(3)(
|
答案
(1)原式=14×
×1 6 2 21
=2 9
=
;2 3
(2)原式=2
-23
+43
=43
;3
(3)原式=(
)2-23
+1-[(3
)2-(5
)2]2
=3-2
+1-(5-2)3
=3-2
+1-33
=1-2
.3
计算: (1)
(2)
(3)(
|
(1)原式=14×
×1 6 2 21
=2 9
=
;2 3
(2)原式=2
-23
+43
=43
;3
(3)原式=(
)2-23
+1-[(3
)2-(5
)2]2
=3-2
+1-(5-2)3
=3-2
+1-33
=1-2
.3