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Maths Puzzle
The 9th term of an Arithmetic Progression is 8 and the 4th term is 20. Find the first term and the common difference.
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- a+8d = 8
a+3d=20
5d= -12
d= (-)12/5
a= 20-3d = 20+36/5 = 136/5 - 12 years agoHelpfull: Yes(1) No(0)
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