Question

Checking my answers
Tell whether the sequence is arithmetic. If it is, what is the common difference?
–12, –7, –2, 3, . . .
I got no it is not arithmetic

Answer 1

Do you know the formula to take the common difference ?

Answer 2

I just thought you subtracted one from another and if it had a common difference like 4 between each then it was arithmetic

Answer 3

If,

\[\huge\ T_3-T_2=T_2-T_1\]

Then it is arithmetic

Here

T_1=first term=–12

T_2=second term=–7

T_3=third term= –2


Start working.

Answer 4

so no its not

Answer 5

because 5 does not equal -5

Answer 6

@ILoVeMaTh3

Please show me your working.

You are misleading.

Answer 7

-2-7=5
-12-(-7)=-5

Answer 8

(-)(-)=+

Answer 9

t2 - t2 = t2-t1 and they do not equal

Answer 10

*t3

Answer 11

Am I not allowed to check my answers that I have already gotten and work them out if they are wrong?

Answer 12

@ILoVeMaTh3

you are doing it wrong

See your terms

You are placing them wrong.

Answer 13

t3 = -2 t2 = -7

Answer 14

-2-(-7)=5
-7-(-12)=5 Ah so it is arithmetic and 5 is the answer

Answer 15

I was making -12 positive

Answer 16

But am I not allowed to check if my answers are correct and work them out if they are wrong with help from people