If `a,b,c,d` are four positive numbers that (i) `(a/b+b/c)(c/d+d/e)le4.sqrt(a/c)` (ii) `(a/b+b/c)(c/d+d/e)ge4.sqrt(a/c)` (iii) `a/b+b/c+c/d+d/e+e/a le 5` (iv) `a/b+b/c+c/d+d/e+e/a ge 1/5`

If a,b,c,d are four positive numbers that (i)((a)/(b)+(b)/(c))((c)/(d)+(d)/(e)) =4.sqrt((a)/(c))(iii)(a)/(b)+(b)/(c)+(c)/(d)+(d)/(e)+(e)/(a) =(1)/(5)

If a,b,c,d are four positive numbers then (A) ((a)/(b)+(b)/(c))((c)/(d)+(d)/(c)) =4.sqrt((a)/(c))(C)(a)/(b)+(b)/(c)+(c)/(d)+(d)/(e)+(e)/(a) =(1)/(5)

If a , b , c , d , e are five consecutive odd numbers, their average is (a) 5(a+4) (b) (a b c d e)/5 (c) 5(a+b+c+d+e) (d) None of these

Let a,b,c,d,e, be real numbers such that a+b lt c+d , b+c lt d+e, c+d lt e+a, d+e lt a+b . Then

If A={a,b},B={c,d},C={d,e} then {(a,c),(a,d)(a,e),(b,c),(b,d),(b,e)}=

Let R be a relation on NxxN defined by (a , b)\ R(c , d)hArra+d=b+c\ if\ (a , b),(c , d) in NxxN then show that: (i)\ (a , b)R\ (a , b)\ for\ a l l\ (a , b) in NxxN (ii)\ (a , b)R(c , d)=>(c , d)R(a , b)for\ a l l\ (a , b),\ (c , d) in NxxN (iii)\ (a , b)R\ (c , d)a n d\ (c , d)R(e ,f)=>(a , b)R(e ,f)\ for all \ (a , b),\ (c , d),\ (e ,f) in NxxN

If A={a,b},B={c,d},C={d,e} then {(a,c),(a,d),(a,e),(b,c),(b,d),(b,e)}=

If A={a,b},B={c,d},C={d,e} , then {(a,c),(a,d),(a,e),(b,c),(b,d),(b,e)} is equal to

If A={a,b},B={c,d},C={d,e} , then {(a,c),(a,d),(a,e),(b,c),(b,d),(b,e)} is equal to