Question

Question #59ec4

Answer 1

See the entire solution process below:

Explanation:

The sequence takes the difference between the two previous numbers, doubles it, and adds this to the last number in the sequence:

Looking at the first two terms in the sequence:

`9 - 4 = 5`; `5 xx 2 = 10`, add it to the last number, `9 + 10 = 19`

Now, look at `9` and `19`:

`19 - 9 = 10`; `10 xx 2 = 20`, add it to the last number, `19 + 20 = 39`

Now, look at `19` and `39`:

`39 - 19 = 20`; `20 xx 2 = 40`, add it to the last number, `39 + 40 = 79`

The missing term in the sequence is: `color(red)(39)`

Answer 2

`39`

Explanation:

Apparently the differnce between term doubles every time:

`4+5=9`

`9+10=19`

`19+20=39`

`39+40=79`

The next term will be:

`79+80=159`