# If a, b, c are positive such that #ab^2c^3 = 64# then the least value of #(1/a + 2/b + 3/c)# is?

##
A) # 6#

B) #2#

C) #3#

D) #32#

A)

B)

C)

D)

##### 2 Answers

Aug 24, 2017

I got C

#### Explanation:

Note that

#a/2 + b/2 + c/2 = 1/2 + 2/2 + 3/2 = 2 +1 = 3#

Please let me know if this is the desired answer.

Hopefully this helps!

Aug 24, 2017

See below.

#### Explanation:

Using inequalities

we get to a particular case

now making