निर्देश (प्र. सं. 43-45) \( \int_{a}^{b} f(x) d x=\int_{a}^{b} f(a+b-x) d x \) का प्रयोग कीजिए।
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निर्देश (प्र. सं. 43-45) \( \int_{a}^{b} f(x) d x=\int_{a}^{b} f(a+b-x) d x \) का प्रयोग कीजिए।
यदि \( I_{1}=\int_{\sec ^{2} z}^{2-\tan ^{2} z} x f\{x(3-x)\} d x \) तथा
माना \( I_{2}=\int_{\sec ^{2} z}^{2-\tan ^{2} z} f\{x(3-x)\} d x \)
जहाँ, \( f \) सातत्य फलन तथा \( z \) वास्तविक संख्या है, तब \( I_{1} / I_{2} \) बराबर है
(A) \( \frac{3}{2} \)
(B) \( \frac{1}{2} \)
(C) 1
(D) 5
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