so, use what they told you:
a+6d = a+4d + 3
a+9d + a+2d = 45
3th term? Is that a typo for 3rd, or for 13th? I assumed 3rd.
Solve for a and d, and then just find
a+19d, a+7d, and S5 = 5/2 (2a+4d)
Given that the 7th term of AP is 3 greater than the 5th term,the sum of the 10th term and 3th term is 45, calculate,20th term,8 term and the sum of the first five terms?.
1 answer