cho b^2=ac . CMR a^2 + b^2 / b^2 + c^2 =a/c
a, Cho a/b = c/d . CMR : a+b/2b = c+d/2d
b, Cho a/c = c/b . CMR : a^2+c^2 / b^2+c^2 = a/b
c, Cho b^2 = ac ( a , b , c # 0 ) . CMR :
a/c = ( a + 2012b )^2 / ( c + 2012c )^2
d, Cho a/b = c/d . CMR :
5a + 3b / 5a - 3b = 5c + 3d / 5c - 3d
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cho b^2 = ac. CMR : a^2+b^2/b^2+c^2 = a/c
cho b^2 = ac. cmr: a^2+b^2/b^2+c^2 = a/c
Cho b2=ac. CMR: \(\dfrac{a}{c}=\dfrac{a^2+b^2}{b^2+c^2}\)
a,cho 3a-b/3a+b=3c-d/3c+d cmr a/b=c/d
b,cho a/b=c/d cmr:b^2+d^2/a^2+c^2=bd/ac
Cho a/b=c/d
CMR: ac/bd=a^2+c^2/b^2+d^2
Cho a/b = c/d
CMR: a^2+b^2/ac = c^2 + d^2/bd
cho a/b=c/d CMR
ac/bd=(a^2+c^2)/(b^2+d^20)