If   `a/b = c/d` , then `( ( a +c )/( b + d ) )` is equal to

If a:b=c:d then (ma+nc)/(mb+nd) is equal to m:n b.d:cn c.an:mb d.a:b

If A = {a, b, c} and B = {b, c, d, e} be two subsets of the universal set U = { a, b, c, d, e} , then ( A cup B) ' is equal to

(cos x)/(a)=(cos(x+theta))/(b)=(cos(x+20))/(b)=(cos(x+3 theta))/(d) then (a+c)/(b+d) is equal to (a)(a)/(d) (b) (c)/(b)(c)(b)/(c)(d)(d)/(a)

If a,b,c are in H.P,b,c,d are in G.P, and c,d,e are in A.P, then (ab^(2))/((2a-b)^(2)) is equal to

(cos x)/(a)=(cos(x+theta))/(b)=(cos(x+2 theta))/(c)=(cos(x+3 theta))/(d) then (a+c)/(b+d) is equal to (A)(a)/(d)(B)(c)/(d)(C)(b)/(c)(D)(d)/(a)

If a+b+c+d=0 then (a+d)^(2)+(b+d)^(2)+(c+d)^(2) is equal to

If a+1=b+2=c+3=d+4=a+b+c+d+5, then (a+b+c+d) is equal to