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\(\int_a^b f(x) \, dx = \int_a^b f(t) \, dt\). যেমন : \(\int_0^1 x^2 \, dx = \int_0^1 t^2 \, dt\)
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\(\int_a^b f(x) \, dx = -\int_b^a f(x) \, dx\)
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\(\int_0^a f(x) \, dx = \int_0^a f(a - x) \, dx\)
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\(\int_a^b f(x) \, dx = \int_a^b f(t) \, dt\). যেমন : \(\int_0^1 x^2 \, dx = \int_0^1 t^2 \, dt\)
\(\int_a^b f(x) \, dx = -\int_b^a f(x) \, dx\)
\(\int_0^a f(x) \, dx = \int_0^a f(a - x) \, dx\)