Question:
The 4th term of an arithmetic progression is 15, 15th term is -29, find the 10th term?
A-5
B-13
C-17
D-9
Answer:
D. -9
Explanation:
a4= a+3d=15 a15= a+14d= -29 11d=-44 hence d= -4 a=27 a10= a+(n-1)d= a+9d = 27+9(-4) = 27-36= -9
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