Question
यदि $\int_{ - 1}^1 {f(x)\,dx = 0} $, तब
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$f(x)=\left\{\begin{array}{ll}-55 x, & \text { if } x < -5 \\ 2 x^{3}-3 x^{2}-120 x, & \text { if }-5 \leq x \leq 4 \\ 2 x^{3}-3 x^{2}-36 x-336, & \text { if } x > 4\end{array}\right.$ द्वारा परिभाषित है। माना $A=\{ x \in R : f$ वर्धमान है $\}$ तो $A$ बराबर है