代数式1x−1+1x+1+2xx2+1+4x3x4+1的化简结果是( ) A.8x5x6−1 B.8x4x8−1 C.4x7x8−1 D.8x7x8−1
问题描述:
代数式
+1 x−1
+1 x+1
+2x
x2+1
的化简结果是( )4x3
x4+1
A.
8x5
x6−1
B.
8x4
x8−1
C.
4x7
x8−1
D.
8x7
x8−1
答
+1 x−1
+1 x+1
+2x
x2+1
4x3
x4+1
=
+2x
x2−1
+2x
x2+1
4x3
x4+1
=
+4x3
x4−1
4x3
x4+1
=
.8x7
x8−1
故选D.