问题
解答题
计算 (1)如ogi14-如ogi7+如og3(如ogi
(i)
|
答案
(1)zog214-zog27+zog3(zog2
)+zog23×zog9163 2
=zog22+zog3
+1 3
×zg3 zg2 zg16 zg9
=1-1+
×zg3 zg2 4zg2 2zg3
=1-1+2=2.
(2)
+(1 2+ 3
)-1 2 2
-32q.1+1 3 4-2 3
=
+(2-2- 3 (2+
)(2-3
)3
)-3 2
-(25)1 3
+1 1q (
-1)23
=2-
+3
-2
+(2
-1)3
=1.