Các câu hỏi tương tự
chứng minh: a/b=c/d
a)a/(a+c)=b/(b+d)
b) (4a-3b)/(4c-3d) = (4a+3b)/(4c+3d)
Cho \(\frac{a}{b}=\frac{c}{d}\). Chứng tỏ
a) \(\frac{a^2+c^2}{b^2+d^2}=\frac{ac}{bd}\)
b) (4a+3b).(4c-3d)= (4a-3b).(4c+3d)ư
tối đi hok rồi
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 )
Tính S = a + b + c + d + e
a) c = 2a ; d = 2b ; 6b + 5c = 6e ; 2a + 3b = 2e ; d - a = 40
b) 3b = 4a ; 3d = 4c ; 3b + c = 2e ; 6d - a = 5e ; c - b = 1
c) 3b = 4a ; 3d = 4c ; 3b + c = 2e ; 4e + b = 5d ; d - a = 5
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 \(\frac{a}{b}=\frac{c}{d}\).Chứng minh:
a)\(\frac{a+c}{a}=\frac{b+d}{b}\)
b)\(\frac{4a+3b}{4c+3d}=\frac{4a-3b}{4c-3d}\)
15 tháng 1 lúc 20:58
B1. Cho a/c=c/b.
b, b^2 - a^2/ a^2 +c^2 = b-a/a
B2. cho a/b=c/d.
CMR: a, 4a-3b/a=4c-3d/c
b,(a-b)^2/(c-d)^2=3a^2+2b^2/3c^2+2d^2
cho \(\frac{a}{b}=\frac{c}{d}\): CMR :
\(a,\frac{4a-3b}{4c-3d}=\frac{4a+3b}{4c+3d}\)
\(b,\frac{a^3+b^3}{c^3+d^3}=\frac{a^3-b^3}{c^3-d^3}\)
Cho frac{a}{b} frac{c}{d},chứng minh rằng:a.frac{4a-3b}{4c-3d}frac{4a+3b}{4c+3d}b.frac{a^2-b^2}{a.b}frac{c^2-d^2}{c.d}c.frac{a-b}{c-d}frac{2a+5b}{2c+5d}CÁC BN ƠI GIÚP MK ĐI MK ĐANG CẦN GẤP.
Đọc tiếp
Cho \(\frac{a}{b}\)= \(\frac{c}{d}\),chứng minh rằng:
a.\(\frac{4a-3b}{4c-3d}\)=\(\frac{4a+3b}{4c+3d}\)
b.\(\frac{a^2-b^2}{a.b}\)=\(\frac{c^2-d^2}{c.d}\)
c.\(\frac{a-b}{c-d}\)=\(\frac{2a+5b}{2c+5d}\)
CÁC BN ƠI GIÚP MK ĐI MK ĐANG CẦN GẤP.