How do I find a natural log without a calculator?
1 Answer
You can approximate
Explanation:
For example, to approximate
#(x_n, 0)# ,#(x_n, 1/x_n)# ,#(x_(n+1), 0)# ,#(x_(n+1), 1/(x_(n+1)))#
If we use strips of width
If you add these, you find:
#3/4+5/12+7/24+9/40+11/60+13/84 ~~ 2.02#
If we use strips of width
Then the total area is:
Actually
Simpson's rule approximates the area under a curve using a quadratic approximation. For a given
#h/3(f(x_0) + 4f(x_0+h) + f(x_0+2h))#
Try improving the approximation using Simpson's rule, using
#h/3(25/6+73/30+145/84+241/180+361/330+505/546)~~1.947#
That's somewhat better.