poopoohead
Member
Could some one please help me with the following questions please???
Q1:
The 20th term of arithmetic series is 131 and the sum of the 6th to 10th terms inclusive is 235. Find the sum of the first 20 terms
Q2: (similar sort of question)
The sum of the first 4 terms of an arithmetic series is 42 and the sum of the 3rd and 7th term is 46. Find the sum of the first 20 terms
Answers (from back of book): Q1: 1290
Q2: 1010
thankyou
Q1:
The 20th term of arithmetic series is 131 and the sum of the 6th to 10th terms inclusive is 235. Find the sum of the first 20 terms
Q2: (similar sort of question)
The sum of the first 4 terms of an arithmetic series is 42 and the sum of the 3rd and 7th term is 46. Find the sum of the first 20 terms
Answers (from back of book): Q1: 1290
Q2: 1010
thankyou