Value Comparison Exercise: Finding the Largest Among Given Numbers

Question

Choose the largest value:

Video Solution

Solution Steps

00:00 Choose the largest value
00:03 A 'regular' root raised to the second power
00:07 Combine into one root by multiplying the orders
00:10 A root raised to the 4th power is like a power with the inverse of 4
00:13 Apply the same method to the following expressions in order to determine the largest value
00:50 This is the solution

Step-by-Step Solution

To solve this problem, we need to express each nested root as a power of 2:

  • For 2 \sqrt{\sqrt{2}} :
    2=21/4 \sqrt{\sqrt{2}} = 2^{1/4}
  • For 23 \sqrt[3]{\sqrt{2}} :
    23=21/6 \sqrt[3]{\sqrt{2}} = 2^{1/6}
  • For 24 \sqrt[4]{\sqrt{2}} :
    24=21/8 \sqrt[4]{\sqrt{2}} = 2^{1/8}
  • For 25 \sqrt[5]{\sqrt{2}} :
    25=21/10 \sqrt[5]{\sqrt{2}} = 2^{1/10}

Now, we compare these powers:

  • 21/4>21/6>21/8>21/102^{1/4} > 2^{1/6} > 2^{1/8} > 2^{1/10} .

Therefore, the largest value is 2 \sqrt{\sqrt{2}} , which corresponds to choice 1.

Answer

2 \sqrt{\sqrt{2}}