Question

The first term of an arithmetic sequence is -5, and the tenth term is 13. Find the common difference.

Thanks in advance!

Answer 1

add 2

Answer 2

i could've googled it if i wanted just the answer, could you explain please?

Answer 3

since you're trying to get to 13 within 10 numbers, you keep adding 2 so that the 10th number is 13

Answer 4

like -5 + 2 is -3 and -3 + 2 is -1 and so on

Answer 5

until you reach 13...

Answer 6

dow do you know it was 2? did you just guess? or is there a formula?

Answer 7

ummm I did guess and check. That works but on a state test you know you need 3 guesses. :T

Answer 8

.. oh. guessing takes ages. but yeah.. i dont have state tests... but thank you anyways. :)

Answer 9

no problem anytime :]