giup minh giai may cau tich phan nguyen ham voiiiiiiiiiiii?

TINH NGUYEN HAM CUA:

a) f(x)= 1/sin^3x

b)f(x)=1/(sinx - sina)

TINH TICH PHAN CUA:

a)

ln2

S căn(e^x - 1)

0

b)

2

S(1+x-1/x)e^(x+1/x)

1/2

TINH THE TICH KHOI TRON XOAY KHI QUAY HINH PHANG XAC DINH BOI

y=lnx, y=0, x=e, quanh truc Oy

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