Pengertian
Integral tentu adalah limit dari jumlah atau luas daerah tertentu.
Rumus
\[\int_a^b f(x)dx = [f(x)]_a^b = f(b) – f(a)\]
\[\int_a^b [f(x) +g(x)]dx = \int_a^b f(x)dx + \int_a^bg(x)dx\]
\[\int_a^b kf(x)dx = k \int_a^b f(x)dx\]
\[\int_a^b [f(x) – g(x)]dx = \int_a^b f(x)dx – \int_a^bg(x)dx\]
\[\int_a^b f(x)dx = – \int_b^a f(x)dx\]
Contoh
\[\int_0^3 (3x^2 – 2x+4) dx\]
\[=[x^3 – x^2 +4x]_0^2\]
\[=(3^3-3^2+4 \cdot 3) – (0^3 – 0^2 +4 \cdot 0)\]
\[= 30\]