Answers

2016-06-25T10:37:49+08:00
Arithmetic sequence =difference of the 1st and the next term is constant

Ex. 1,3,5,7,9 d=2

Problem: Find the 5 terms between a1=13 a7=55
Find the common difference

An= a1+(n-1)d
55=13+(7-1)d
55-13=6d
42=6d
Divide both aides by 6 to remove 6 from d
42/6=7 6/6d
d=6
13,20,27,34,41,48,55

Find the 3 terms between a1=1 a5=14/2

An=1+(5-1)d
14/2-1=4d
12/2=4d
12/2=4/1d
Get the reciprocal the fraction in the d, since 4 is a whole number you have to add 1 as a denominator
12/2=1/4
Use cross division
12/4 1/2
12/4=3
Just copy the denominator
d=3/2

1, 5/2, 8/2, 11/2, 14/2

1 5 1
San po po nakuha yung 7 dun sa 55=13+(7-1)d?
ung 7 kung ilan ung terms sa isang sequence