Question

help do not understand this and did I do this right

Answer 1

@Vocaloid

Answer 2

@Vocaloid

Answer 3

@sweetburger

Answer 4

You're on the right track you just need to replace d with your common difference (10)

Answer 5

And replace a1 with the first term

Answer 6

So you have this written down:

an = a_n-1 + (n-1)d

You just need to replace a1 with the first term and d with the common difference

Answer 7

Sorry should be an = a1 + (n-1)d

Answer 8

d is 10, it doesn't change

Answer 9

a1 = 2

Answer 10

Everything else in the formula stays the same

Answer 11

So an = a1 + (n-1)d

Becomes

an = 2 + (n-1)10

Answer 12

Like this

Answer 13

First off you only need one formula

Answer 14

a1 is fixed, you don't change it to a2 or a3 ^^

Answer 15

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Vocaloid
So an = a1 + (n-1)d

Becomes

an = 2 + (n-1)10
\(\color{#0cbb34}{\text{End of Quote}}\)

It's just this

Answer 16

You only need the first line you wrote ^^

Answer 17

There's only one explicit formula for every series

Answer 18

Ohhhh

Answer 19

Also you need to add 2 + to the beginning

Answer 20

an = 2 + (n-1)10

Answer 21

Okay si let me try the next one by my own

Answer 22

Ugh please tell me i did this right 😟

Answer 23

Good, just make sure to include parentheses around (-4) just to be extra clear ^^

Answer 24

Otherwise it might look like subtraction

Answer 25

Thank you thank you😶