Maths · Arithmetic and Geometric progressions
The 3 rd and 6 th term of an arithmetic progression are 13 and -5 respectively.
The 3 rd and 6 th term of an arithmetic progression are 13 and -5 respectively. What is the 1 1th term?
- A. -29
- B. -41
- C. -47
- D. -35
Step-by-step solution
Given a3=13 and a6=-5, solve a+2d=13 and a+5d=-5 to get d=-6, a=25. Then a11 = a+10d = 25-60 = -35.
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