Riley Ayala
10/03/2023 · Primary School

14. Find the derivative of the function by first expanding the expression. \[ f(x)=(9 x+7)^{2} \] \( f^{\prime}(x)=\square \) 15. Find \( f^{\prime}(x), f^{\prime \prime}(x) \), and \( f^{(3)}(x) \) for the following function.

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**السؤال 14:** إذا كانت الدالة \( f(x) = (9x + 7)^2 \)، فيمكن توسيعها لتصبح: \[ f(x) = 81x^2 + 126x + 49 \] ثم المشتقة الأولى \( f^{\prime}(x) \) هي: \[ f^{\prime}(x) = 162x + 126 \] **السؤال 15:** يرجى تقديم الدالة الكاملة لكي أتمكن من حساب المشتقات الأولى، الثانية، والثالثة لها.

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