Một nguyên hàm của hàm số $% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaqcaaSaamOzaO % WaaeWaaKaaahaacaWG4baacaGLOaGaayzkaaGaeyypa0Jcdaqadaqc % aaCaaiaadIhacqGHsislcaaIZaaacaGLOaGaayzkaaGcdaahaaqcba % CabeaacaaIYaaaaaaa!42BB! f\left( x \right) = {\left( {x - 3} \right)^2}$ trên R là:

Ta có $% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaa8qaaeaaca % WGMbWaaeWaaeaacaWG4baacaGLOaGaayzkaaGaaeizaiaadIhaaSqa % beqaniabgUIiYdaaaa!3D44! \int {f\left( x \right){\rm{d}}x}$$% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaa8qaaeaada % qadaqaaiaadIhacqGHsislcaaIZaaacaGLOaGaayzkaaWaaWbaaSqa % beaacaaIYaaaaOGaaeizaiaadIhaaSqabeqaniabgUIiYdaaaa!3EF6! = \int {{{\left( {x - 3} \right)}^2}{\rm{d}}x}$$% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaa8qaaeaada % qadaqaaiaadIhacqGHsislcaaIZaaacaGLOaGaayzkaaWaaWbaaSqa % beaacaaIYaaaaOGaaeizamaabmaabaGaamiEaiabgkHiTiaaiodaai % aawIcacaGLPaaaaSqabeqaniabgUIiYdaaaa!4229! = \int {{{\left( {x - 3} \right)}^2}{\rm{d}}\left( {x - 3} \right)}$$% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaeyypa0ZaaS % aaaKaaGgaakmaabmaajaaObaGaamiEaiabgkHiTiaaiodaaiaawIca % caGLPaaakmaaCaaajeaObeqaaiaaiodaaaaajaaObaGaaG4maaaacq % GHRaWkcaWGdbaaaa!4139! = \frac{{{{\left( {x - 3} \right)}^3}}}{3} + C$

Chọn C = 2017 ta được một nguyên hàm của hàm số $% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaqcaaSaamOzaO % WaaeWaaKaaahaacaWG4baacaGLOaGaayzkaaGaeyypa0Jcdaqadaqc % aaCaaiaadIhacqGHsislcaaIZaaacaGLOaGaayzkaaGcdaahaaqcba % CabeaacaaIYaaaaaaa!42BB! f\left( x \right) = {\left( {x - 3} \right)^2}$ là .

$% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaqcaaQaamOraO % WaaeWaaKaaGgaacaWG4baacaGLOaGaayzkaaGaeyypa0JcdaWcaaqc % aaAaaOWaaeWaaKaaGgaacaWG4bGaeyOeI0IaaG4maaGaayjkaiaawM % caaOWaaWbaaKqaGgqabaGaaG4maaaaaKaaGgaacaaIZaaaaiabgUca % RiaaikdacaaIWaGaaGymaiaaiEdaaaa!4819! F\left( x \right) = \frac{{{{\left( {x - 3} \right)}^3}}}{3} + 2017$