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g'(x) = 6x(2x-7) + (3x²+6)(2)
= 12x² - 42x + 6x² + 12
= 18x² - 42x + 12
atau
g(x) = 6x³ - 21x² + 12x -42
g'(x) = 18x² - 42x + 12
APA KABAR TAZLHA
misalkan u = 3x² + 6 maka u' = 6x
v = 2x - 7 maka v' = 2
f '(x) = u'.v + uv'
= 6x . (2x - 7) + (3x² + 6) . 2
= 12x² - 42x + 6x² + 12
= 18x² - 42x + 12