identities
回答 (1)
2007-02-11 7:43 am
✔ 最佳答案
If 3x-C(2x+1) is an identity of D(2x-1), find the values of C and D. 3x-C(2x+1) =D(2x-1)
3x-2Cx-C=2Dx-D
(3-2C)x-C=2Dx-D
C=D
3-2C=2D
SO
3-2D=2D
C=D=3/4
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