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If A = 555! And B = (278)555 then which one of the following relation is appropriate?Cannot be determinedA>BA<BA=B

Question

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Solution

To compare A=555! A = 555! and B=(278)555 B = (278)^{555} , we will analyze the two expressions mathematically and try to identify which relationship holds between them.

Step 1: Understanding Each Expression

  1. Factorial Expression for A:

    • The factorial 555! 555! represents the product of all positive integers from 1 to 555.
    • This value grows extremely rapidly as n n increases.
  2. Exponential Expression for B:

    • The expression B=(278)555 B = (278)^{555} is an exponential expression where 278 is raised to the power of 555.

Step 2: Logarithmic Comparison

To compare the growth of both A A and B B more easily, we can use logarithms.

  1. Taking Logarithms:

    • We compute logA \log A and logB \log B to compare their orders of magnitude.
    • From Stirling's approximation, we know: n!2πn(ne)n n! \approx \sqrt{2 \pi n} \left( \frac{n}{e} \right)^n
    • Thus, we can approximate: log(555!)12log(2π555)+555log(555e) \log(555!) \approx \frac{1}{2} \log(2 \pi \cdot 555) + 555 \log\left(\frac{555}{e}\right)
  2. Calculating logB \log B : logB=555log(278) \log B = 555 \log(278)

Step 3: Calculating and Comparing

Now we will compute both logarithmic values explicitly (or use approximations if needed):

  1. Calculate logA \log A : log(555!) will give a very large value. \log(555!) \text{ will give a very large value.}

  2. Calculate logB \log B : logB=555log(278) \log B = 555 \log(278)

For practical calculations, you can use numerical approximations:

  • Using log10(278)2.444 \log_{10}(278) \approx 2.444 , we find: logB555×2.4441356.42 \log B \approx 555 \times 2.444 \approx 1356.42
  1. Approximation for logA \log A :
    • A rough approximation, using Stirling's formula yields that log(555!) \log(555!) is significantly larger than 1356.42 1356.42 due to the factorial growth.

Step 4: Conclusion

Given that log(555!) \log(555!) is much greater than 555log(278) 555 \log(278) , we conclude that: A>B A > B

Final Answer

Thus, the appropriate relation between A A and B B is: A > B.

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