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Bài 4.Cho a/b=c/d.CMR:
a,2a+c/2b+d=a/db
b,a.(2b+3d)=b.(2a+3c)
FUCK KU(Đ.A.B)
cho a/b=c/d c/m 2a+3c/2a-3c=2b+3d/2b-3d
3 tháng 5 2023 lúc 20:31
Cho a/b=c/d Với b/d khác +-3/2 . Chứng minh rằng:
a)2a+3c/2b+3d=2a-3c/2b-3d.
b)a^2+c^2/b^2+d^2=ac/bd
Cho a/b=c/d chứng minh rằng 2a+c/2b+d=2a-3c/2b-3d
cho a/b = c/d chung minh
1, ( 2a + 3c ) . ( 2b - 3d ) = ( 2a - 3c ) . ( 2b + 3d )
2, ( 4a + 3b ) . ( 4c - 3d ) = ( 4a - 3c ) . ( 4c + 3d )
Cho a/b=c/d
Cứng minh 2a+c/2b+d=2a-3c/2b-3d
Cho \(\dfrac{a}{b}=\dfrac{c}{d}\). Chứng minh:
1) \(\dfrac{2a+3c}{2b+3d}=\dfrac{2a-3c}{2b-3d}\)
2) \(\dfrac{4a-3b}{4c-3d}=\dfrac{4a+3b}{4c+3d}\)
3) \(\dfrac{3a+5b}{3a-5b}=\dfrac{3c+5d}{3c-5d}\)
4) \(\dfrac{3a-7b}{b}=\dfrac{3c-7d}{d}\)
Cho tỉ lệ thức a/b. Với b/d khác +- 3/2
Cm : 1) 2a + 3c/2b + 3d = 2a - 3c /2b - 3d
2) a^2 + c^2/b^2+d^2
1) Cho a/b=c/d. CMR: a)2a+c/2b+d=a/b
b) a.(2b+3d)=b.(2a+3c)