Answers

2015-12-15T09:04:15+08:00
The 25th is 99 or ninety nine
0
how? o-o pls. explain... can you?
how? can you explain? or just give the solution?
  • Brainly User
2015-12-16T09:14:10+08:00
Arithmetic sequence:
a _{n} = a _{1} + (n-1)(d)

Where:
n = number of terms (nth term) ⇒   25
a _{n} = last term in the sequence   ⇒  unknown
a _{1} = first term in the sequence   ⇒  3
d = common difference (difference between any two consecutive terms in the sequence)
d = 4

Solution:
a _{25} = 3 + (25-1) (4)
a _{25} = 3 + (24)(4)
a _{25} = 3 + 96
a _{25} = 99

ANSWER: The 25th term in the sequence is 99.



1 5 1