2 .2 ln 121 + x 4 − 2x 4x 3Z1 − x 4e) I =x (1 + x 4 ) dx =x dx − 21 + x 4 dx=1 + x 4 ln |x| − 1= 12 ln 8

2 LN 122221 + X 4 − 2X 4X 3ZZ1Z1 − X 4ZE) I =X (1 + X 4 ) DX =X DX...

Toán DAP AN CHUYEN DE TOÁN NGUYÊN HÀM - TÍCH PHÂN

2 .

2 ln

1

2 1 + x ⁴ − 2x ⁴

x ³

Z

1 − x ⁴

e) I =

x (1 + x ⁴ ) dx =

x dx − 2

1 + x ⁴ dx

=

1 + x ⁴

ln |x| − 1

= 1

2 ln 8

2 LN 122221 + X 4 − 2X 4X 3ZZ1Z1 − X 4ZE) I =X (1 + X 4 ) DX =X DX...