问题
解答题
(1)计算:2-2-(
(2)已知x=-
|
答案
(1)2-2-(
-π)0+2tan45°,3
=
-1+2,1 4
=
;5 4
(2)(1+
)(x+1),1 x+1
=
×(x+1),x+1+1 x+1
=x+2,
当x=-
时,原式=-3
+2.3
(1)计算:2-2-(
(2)已知x=-
|
(1)2-2-(
-π)0+2tan45°,3
=
-1+2,1 4
=
;5 4
(2)(1+
)(x+1),1 x+1
=
×(x+1),x+1+1 x+1
=x+2,
当x=-
时,原式=-3
+2.3