If `a ,\ b ,\ c` are in proportion, then (a) `a^2=b c` (b) `b^2=a c` (c) `c^2=a b` (d) None of these

If a ,\ b ,\ c ,\ d are in proportion, then (a) a b=c d (b) a c=b d (c) a d=b c (d) None of these

If a,b,c are in proportion,then a^(2)=bc(b)b^(2)=ac(c)c^(2)=ab(d) None of these

If a ,\ b ,\ c are in proportion, then (a) a : b :: b : c (b) a : b :: c : a c) a : b :: c : b (d) a : c :: b : c

If a,b,c,d are in proportion, then prove that sqrt((a^2+5c^2)/(b^2+5d^2))=a/b

If a,b,c,d are in proportion then prove that sqrt((a^2+5c^2)/(b^2+5d^2))=a/b

If a, b, c are in continued proportion, prove that (a+b+c)(a-b+c)=a^(2)+b^(2)+c^(2) .

a ,b ,c x in R^+ such that a ,b ,and c are in A.P. and b ,c and d are in H.P., then a b=c d b. a c=b d c. b c=a d d. none of these

If a,b,c re in continued proportion then show that a/c=(a^2+ab+b^2)/(b^2+bc+c^2)

If a,b,c,d are in continued proportion then show that (b-c)^2+(c-a)^2+(b-d)^2= (a-d)^2 .

If x^2+p x+1 is a factor of the expression a x^3+b x+c , then a^2-c^2=a b b. a^2+c^2=-a b c. a^2-c^2=-a b d. none of these