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Explain the answer (Please help.) Asp

Explain the answer (Please help.) Asp-example-1
User Kamal Pal
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Hello from MrBillDoesMath!

Answer:

(1/x) * ( (1/ln7) - (1/ln9) )

Discussion:

Using the change of base formula

log_b(x) = ln(x) / ln(b) sp where _b means to log to base b

f(x) = ln(x)/ln(7) - ln(x)/ln(9)

so

f' = (1/x) *(1/ln7) - (1/x) *(1/ln9)

= (1/x) * ( (1/ln7) - (1/ln9) )

Thank you,

MrB

User Levanovd
by
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