rks each)
Q.1 Write fourth term of an AP, when the first term is 4 and the common difference is -3.
Q.2 Write a quadratic polynomial, sum of whose zernes is 1 and product is 1
Answers
Answered by
1
Answer:
Let d be the common difference. The sum of the first 12 terms is then
4+(4+d)+(4+2d)+ ... +(4+11d)
Recall now the key fact that the sum of the first n integers is (n+1)n2. Obviously you can write the expression for the sum of the first 8 terms similarly and it should now reduce just to arithmetic.
Similar questions