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u = x ,
du = dx
dv = (3x-5)⁴ dx ,
v = ¹/₅ (3x-5)⁵. ¹/₃
= ¹/₁₅ (3x-5)⁵
∫ u. dv = uv - ∫ v.du
= x. ¹/₁₅ (3x-5)⁵ - ∫ ¹/₁₅ (3x-5)⁵ dx
= ¹/₁₅ x (3x-5)⁴ - 1/15 . ¹/₆ (3x-5)⁶. ¹/₃
= 1/15 x (3x-5)⁴ - ¹/₂₇₀ (3x-5)⁶ + c
2) ∫(4x^2 - 2x + 1) dx = ⁴/₃ x³ - x² + x
= [ ⁴/₃ (1)³ - (1)² + (1) ] - [⁴/₃ (-3)³ - (-3)² + (-3) ]
= [ ⁴/₃ ] - [ - 36 - 9 - 3 ]
= ⁴/₃ + 36+9+3
= 48 ⁴/₃
= 49 ¹/₃