algorithm - How do you write a summation of the following -

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दिया 

  d0 = 0 d1 = 5 + 3d0 d2 = 5 + 3d1 .. .nn = 5 + 3dn-1

मैं इसे कैसे अप करने के लिए सारांश लिखूंगा

यहां एक अधिक सामान्य समस्या और समाधान है च (एक्स) = कुल्हाड़ी + बी चलो (आपके मामले में एक्स = 0, ए = 3, और बी = 5) यदि आप एफ (एक्स) एन बार पुनरावृत्त, यानी एफ (एफ (एफ ... (एक्स) ...)) एन एफ के साथ, आप

एक ^ nx + b (1 + a + a ^ 2 + ... + a ^ (n-1))

राशि (1 + एक + एक ^ 2 + ... + a ^ (n-1)) को कम किया जा सकता है (a ^ n - 1) / (a ​​- 1) यदि a! = 1।


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