Example 3 And therefore,by differentiating and using the chain rule, r=2r网+25(-例.y≥0Example 3 ◼ And therefore, by differentiating and using the chain rule, 𝑓𝑌 = 1 2 𝑦 𝑓𝑋 𝑦 + 1 2 𝑦 𝑓𝑋 − 𝑦 , 𝑦 ≥ 0