Question

What is the 13th term of this arithmetic sequence?

132, 135, 138, 141, …

Answer 1

a 168
b 172
c 176
d 179

is it d?

Answer 2

135 - 132 = 3
138 - 135 = 3

Add 3 to previous number. They give you 4. What can you do to find the answer?

Answer 3

add 4?? sorry im confused:/

Answer 4

no I mean they give you the first 4 numbers

Answer 5

make a table

132, 135, 138, 141 .... ?
1 2 3 4 ....13


to get from one elementh to then next you need to add so lets do that

132+x=135 x=3 when solve for x


so lets continue our table

132, 135, 138, 141 .... ?
1 2 3 4 ....13 <ith element
0*3 1*3 2*3 3*3 12*3

the 3rd row says we added i*3 where i is current element-1

we can see the pattern emerge that says we add 3rd row to original number in the sequence like so

((13-1)*3)+132
12*3+132
36+132

168

Answer 6

oh ok ok .. now i get it lol thank you!

Answer 7

gosh it was easier than what i thought it was lol thanks guys