ขออนุญาติแยกเป็นข้อ ๆ นะคะ
1. where the final equality is understood by recognising that it represents the
expansion of binomial. If we differentiate the moment generating function with
respect to t using the function-of-a-function rule, then we get
2. Notice that this result is already familiar and that we have obtained it previ-ously by
somewhat simpler means.
To find the second moment, we use the product rule
เหงิ่ม...คืออยากให้ช่วยแปลประโยคภาษาอังกฤษแบบคณิตศาสตร์ให้หน่อยค่ะ รบกวนผู้รู้ด้วยนะคะ
1. where the final equality is understood by recognising that it represents the
expansion of binomial. If we differentiate the moment generating function with
respect to t using the function-of-a-function rule, then we get
2. Notice that this result is already familiar and that we have obtained it previ-ously by
somewhat simpler means.
To find the second moment, we use the product rule
แหง่ววว 2 ข้อ ขอบคุณล่วงหน้าเลยค่ะ