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The integral ∫ + 4 / 3 4 2 ) 1 x ( x dx equals :

1. 4 1 4 4 x 1 x ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ + + c
2. 4 1 4 ) 1 x ( + + c
3. 4 1 4 ) 1 x ( + − + c
4. 4 1 4 4 x 1 x ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ + − + c

Correct answer: 4 1 4 4 x 1 x ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ + − + c

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