We need to use 7 terms to estimate the value of ln(1.4) to within 0.0001.
A Maclaurin series is a function that is used to estimate the values functions, evaluate the sum, or determine the value of the anti-derivative of a function.
We have:
f(x)=ln(1+x)
Expansion of In(1+x) up to seven terms is:
In(1+x) = x - x^2/2 + x^3/3 - x^4/4 + x^5/5 - x^6/6+ x^7/7
Where it is known that -1 <= x <= 1
Put x=0.4 in the above series:
ln(1.4) = 0.4 - 0.4^2/2 + 0.4^3/3 - 0.4^4/4 + 0.4^5/5 - 0.4^6/6+ 0.4^7/7
We get:
ln(1+4) = 0.3365333
Therefore, we need 7 terms to estimate the value of ln 1.4 to within 0.0001.
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