Kalkulator Integral Tentu dan Tak Wajar
Hitung integral tentu dan tak wajar langkah demi langkah
Kalkulator akan mencoba mengevaluasi integral tentu (yaitu dengan batas-batas), termasuk integral tak wajar, dengan menampilkan langkah-langkahnya.
Solution
Your input: calculate $$$\int_{1}^{e}\left( \frac{1}{x} \right)dx$$$
First, calculate the corresponding indefinite integral: $$$\int{\frac{1}{x} d x}=\ln{\left(\left|{x}\right| \right)}$$$ (for steps, see indefinite integral calculator)
According to the Fundamental Theorem of Calculus, $$$\int_a^b F(x) dx=f(b)-f(a)$$$, so just evaluate the integral at the endpoints, and that's the answer.
$$$\left(\ln{\left(\left|{x}\right| \right)}\right)|_{\left(x=e\right)}=1$$$
$$$\left(\ln{\left(\left|{x}\right| \right)}\right)|_{\left(x=1\right)}=0$$$
$$$\int_{1}^{e}\left( \frac{1}{x} \right)dx=\left(\ln{\left(\left|{x}\right| \right)}\right)|_{\left(x=e\right)}-\left(\ln{\left(\left|{x}\right| \right)}\right)|_{\left(x=1\right)}=1$$$
Answer: $$$\int_{1}^{e}\left( \frac{1}{x} \right)dx=1$$$