LollyLau
  • LollyLau
[A bit challenging problem] Which of the following is largest: 3^210, 7^140, 17^105, or 31^84? Explain your answer.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
LollyLau
  • LollyLau
Solve it with Python?
anonymous
  • anonymous
This can be solved in a line of python!
LollyLau
  • LollyLau
Anyone not using Python?

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phi
  • phi
You can (obviously) use a calculator or even the google search window to evaluate each expression. For example, type 210*log(3)= in the google search window. However, you do not need a calculator. Starting with \[3^{210}7^{140} 17^{105} 31^{84}\] we can approximate these expressions by replacing the base with the nearest power of 2: 3 -> 2^2 (4) , 7 -> 2^3 (8), 17-> 2^4 (16), 31-> 2^5 (32) from which we get \[2^{2\cdot 210}= 2^{420}\] \[2^{3\cdot 140}= 2^{420}\] \[2^{4\cdot 105}= 2^{420}\] \[2^{5\cdot 84}= 2^{420}\] So all of them are approximately equal. BUT notice that three of our approximations are larger than the original expression (for example, 3^210 < 2^420 ), but one of the original expression is greater than the approximation : 17^105 > 16^105 Conclusion: 17^105 is larger than the other three.

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