If a × b × v × d × e = 1 and a,b v,d,e are all positive real numbers; what is the minimum value of a

If a × b × v × d × e = 1 and a,b v,d,e are all positive real numbers; what is the minimum value of a




Solution -

if a*b=1 and a and b re +ve (a+b) >2(get by squaring a+b). minimum should be 5 for a+b+c+d+e when all are 1