a = 7
a+9d = 2(a+d)
7 + 9d = 14 + 2d
7d = 7
d = 1
Now you have a and d, use your formulas to find all the questions that were asked.
Given that the first term of an AP is 7 and its 10th term is twice the second term, calculate
a. 19th term b. Sum of the 28th term c. Difference between the 9th and 6th term?
1 answer
1 answer