If a, b are postitive real numbers such that ab=1, then the least value of the expression `(1+a)(1+b)` is

If a, b, c are positive real numbers such that a+b+c=1 , then the greatest value of (1-a)(1-b)(1-c), is

If a, b, c are positive real numbers such that a+b+c=1 , then the greatest value of (1-a)(1-b)(1-c), is

a, b are positive real numbers such that 1/a+9/b=1 The smallest value of a + b is

If a,b,c,d are four positive real numbers such that abcd =1 then find the least value of (a+4) ( b+4) ( c+4) (d+4) .

If a b c are positive real numbers such that a+b+c=1 then the least value of ((1+a)(1+b)(1+c))/((1-a)(1-b)(1-c)) is

If a,b,c,d are four positive real numbers such that abcd=1 then least value of (a+4)(b+4)(c+4)(d+4) is

If a,b,c are positive real numbers such that a+b+c=1 , then find the minimum value of (1)/(ab)+(1)/(bc)+(1)/(ac) .

If a,b,c are positive real number, then the least value of (a+b+c)(1/a+1/b+1/c) is

Let a,b and c be three positive real numbers such that their product is unity,then the least value of (1+a)(1+b)(1+c) is