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Damm [24]
3 years ago
5

The 7th term of an A.P is 15 and the fourth term is 9.what is 25th term?

Mathematics
2 answers:
oksano4ka [1.4K]3 years ago
5 0

Answer:

A25=61

Step-by-step explanation:

Alex787 [66]3 years ago
3 0
7th term is 15 and the fourth term is 9

Common difference: (15-9)/(7-4) = 2

Counting backwards from the fourth term will give us the "zeroth term"

A0 = 1

The closed formula for the sequence is

An = dn + A0

The 25th term is:

A25 = 2(25) + 1

A25 = 51

Hope this helps!
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