Search for: The coefficient of x5 in the expansion of (1+x)21+(1+x)22+(1+x)23 +……….. + (1+x)30 is The coefficient of x5 in the expansion of (1+x)21+(1+x)22+(1+x)23 +........... + (1+x)30 is A51C5B9C5C31C6-21C6D31C6+20C5 Fill Out the Form for Expert Academic Guidance!l Grade ---Class 1Class 2Class 3Class 4Class 5Class 6Class 7Class 8Class 9Class 10Class 11Class 12 Target Exam JEENEETCBSE +91 Preferred time slot for the call ---9 am10 am11 am12 pm1 pm2 pm3 pm4 pm5 pm6 pm7 pm8pm9 pm10pm Please indicate your interest Live ClassesBooksTest SeriesSelf Learning Language ---EnglishHindiMarathiTamilTeluguMalayalam Are you a Sri Chaitanya student? NoYes Verify OTP Code (required) I agree to the terms and conditions and privacy policy. Solution:(1+x)21+(1+x)22+…+(1+x)30=(1+x)21(1+x)10−1(1+x)−1=1x(1+x)31−(1+x)21⇒ Coefficient of x5 in the given expression = Coefficient of x5 in 1x(1+x)31−(1+x)21 = Coefficient of x6 in (1+x)31−(1+x)21 =31C6−21C6 Related content Nucleus Diagram for Class 9 Neuron Diagram Class 9 Human Heart Diagram Class 10 CBSE Class 7 Science Chapter 1 Nutrition in Plants MCQ Questions with Answers CBSE Class 9 English Worksheet – The Road not Taken 50+ GK Questions and Answers for Class 8 “Kabir Ki Sakhiyan” MCQ Questions for Class 9 Hindi with Answers Kshitij, Kritika, Sparsh, Sanchayan Bhag 1 CBSE Class 7 English Honeycomb Chapter 1 Three Questions MCQ Questions with Answers CBSE Class 9 English Beehive Book Poem 1 The Road Not Taken MCQ Questions with Answers MCQs Questions with Answers for Class 9 English Chapter 1 The Fun They Had