Problem 10.1.10. (a) Use the fact that for large n, 1+1/2+3+... + ≈ ln (n + 1) + y to determine approximately how large n must be to make 1 1 1 1+ + + + > 100. 2 3 n (b) Suppose we have a supercomputer which can add 10 trillion terms of the Harmonic Series per second. Approximately how many earth lifetimes would it take for this computer to sum the Harmonic Series until it surpasses 100?

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Problem 10.1.10.
n
(a) Use the fact that for large n, 1+ 2+ 3+ + ½⁄2 ≈ ln (n + 1) + y to
determine approximately how large n must be to make
1
1
1
1+ + + + >100.
2 3
n
(b) Suppose we have a supercomputer which can add 10 trillion terms of the
Harmonic Series per second. Approximately how many earth lifetimes would it
take for this computer to sum the Harmonic Series until it surpasses 100?
Transcribed Image Text:Problem 10.1.10. n (a) Use the fact that for large n, 1+ 2+ 3+ + ½⁄2 ≈ ln (n + 1) + y to determine approximately how large n must be to make 1 1 1 1+ + + + >100. 2 3 n (b) Suppose we have a supercomputer which can add 10 trillion terms of the Harmonic Series per second. Approximately how many earth lifetimes would it take for this computer to sum the Harmonic Series until it surpasses 100?
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