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#Exercise

#Exercise 4.3 #Questions 6–10 Exercise 4.3 is based on the concept of Arithmetic Progression (A.P.). These questions test students’ understanding of terms of A.P., sum of series, and real-life applications of arithmetic sequences. Question 6 This question involves terms of an arithmetic progression. Some sums of specific terms are given, and students are required to find another combination of terms. It checks understanding of the general term formula of A.P. and relationships between terms. Question 7 This question asks to find the sum of a series of odd numbers up to a certain number of terms (3n terms). It focuses on applying the formula of the sum of an arithmetic series. Question 8 This is a proof-based question. It asks students to show that the sum of the first n positive odd integers equals n². It develops reasoning and proof skills using A.P. concepts. Question 9 This question deals with finding the sum of multiples of 9 between two given numbers. It applies arithmetic progression in number problems and requires identifying first term, last term, and number of terms. Question 10 This is a word problem. A certain amount of money is distributed among four people such that each next person receives Rs. 20 less than the previous one. Students must form an A.P. and use the sum formula to solve the problem