Kev sib koom ua ke ntawm 1 yog dab tsi?
Kev sib koom ua ke ntawm 1 yog dab tsi?

Video: Kev sib koom ua ke ntawm 1 yog dab tsi?

Video: Kev sib koom ua ke ntawm 1 yog dab tsi?
Video: Mam tos hauv nruab dab. (1 tsug 13 hnub .PART#1.)_Phees lauj OFFICIAL MV 2022 2024, Kaum ib hlis
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Qhov tseeb integral ntawm 1 yog thaj tsam ntawm ib daim duab plaub ntawm x_lo thiab x_hi qhov twg x_hi > x_lo. Feem ntau, qhov indefinite integral ntawm 1 tsis tau txhais, tshwj tsis yog rau qhov tsis paub tseeb ntawm ib qho ntxiv tiag tiag, C. Txawm li cas los xij, hauv qhov tshwj xeeb thaum x_lo = 0, qhov indefinite integral ntawm 1 is equal to x_hi.

Tsis tas li ntawd, qhov tseem ceeb ntawm 1 u 2 yog dab tsi?

Los ntawm Txoj Cai Fais Fab, lub ib qho ntawm u − 2 nrog rau u yog- u − 1 . Rewrite - u − 1 +C - u - 1 + C ua- 1 ua +C - 1 ua u + C.

Ib sab saum toj no, kev sib koom ua ke ntawm 0 yog dab tsi? Noj cov derivative ntawm ib qho kev ua haujlwm tas li yog 0 , i.e. d(c)/dx= 0 Yog li lub indefinite ib qho ∫0dx tsim cov chav kawm ntawm cov haujlwm tas li, uas yog f(x) = c rau qee qhov c. Nws tseem yuav tsum tau muab sau tseg tias qhov tseeb ib 0 tshaj ib ntus yog 0 , as ∫0dx=c−c= 0.

Ua kom pom qhov no, qhov kev sib koom ua ke ntawm qhov tsis tu ncua yog dab tsi?

Cov ib qho ntawm a tas li yog sib npaug li ntawd tas li lub sij hawm hloov pauv ntawm kev koom ua ke ntxiv ib arbitrary tas li . Qhov no yog vim kev koom ua ke yog qhov txawv ntawm qhov sib txawv.

Yuav ua li cas koj integrate Cos 2x?

Cov ib qho ntawm cos ( 2x ib ) yog (1/2) sin( 2x ib ) + C, qhov C yog qhov tsis tu ncua.

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