Use NINT on a calculator to find the numerical integral of the function over the specified interval.
-$$f ( x ) = \frac { 1 } { 1 + 9 x } ; [ 0,9 ]$$
Round to three decimal places.
A) $0.49$
B) $- 0.497$
C) $1.724$
D) $- 0.49$

Question

Quizplus · Accepted Answer

The numerical integral of the function $f(x) = \frac{1}{1+9x}$ over the interval $[0,9]$ can be found using a calculator's numerical integration function (NINT). The result, rounded to three decimal places, is $0.49$. This is because the function represents a decreasing function over the interval [0,9], and its integral represents the area under the curve, which is positive.

Use NINT on a Calculator to Find the Numerical Integral f(x)=11+9x;[0,9]f ( x ) = \frac { 1 } { 1 + 9 x } ; [ 0,9 ]f(x)=1+9x1​;[0,9]

Use NINT on a Calculator to Find the Numerical Integral $f ( x ) = \frac { 1 } { 1 + 9 x } ; [ 0,9 ]$