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do you want the whole steps or just a result?
the final result is an = -7 *6^n

LOL

What's wrong? and what makes you laugh

You have left a lot of space. :-)

I don't know why the net post it up. I am not good at computer

I think we can do this using the geometric sequence formula.

yes, you are right. show me your work. now is your turn

Your answer is correct anyway.

\(a_1 = -42\) and \(r = -6\). Now use the following formula:\[a_n = a_1 \times r^{n - 1}\]

how to get r?

I'd leave it to the asker to do the rest.

I need help from my problem, may I have yours?

Sure, what may I help you with?

This is an interesting problem. Let's see.

You can just message me here; I check this site much often... more than I check my email

dealt. since I have to go. send me message when you've done. Nice to see.

Cya!