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	Các bình luận về: Cho hàm số \(f\left( x \right) = 3{x^3} + b{x^2} + cx + d\) với \(b,\,c,\,d \in \mathbb{R}\). Biết hàm số \(g\left( x \right) = f\left( x \right) + f&#8217;\left( x \right) + f&#8221;\left( x \right)\) có hai giá trị cực trị là \( &#8211; 12;\,\,6\). Diện tích hình phẳng giới hạn bởi các đường \(y = \frac{{f\left( x \right)}}{{g\left( x \right) + 18}}\) và \(y = 1\) bằng	</title>
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