find k for 2^x+2^x+2^x+2^x=2^k / simplify (3-(3/x)/(x-1)

[jbo120]

I can't figure out two problems:

1) If 2^x + 2^x + 2^x + 2^x = 2^k, what is x in terms of k?

2) What is (3 - (3/x) / (x - 1) simplified?

 

[stapel]

1) What is 2^x + 2^x + 2^x + 2^x? How does this simplify? Can you express this as a power of 2?

2) You have an unmatched parenthesis. Do you mean the following?

. . . . .\(\displaystyle \L \frac{\left(3\, -\,\frac{3}{x}\right)}{x\, -\, 1}\)

When you reply, please show all of the steps you have tried so far. Thank you.

Eliz.

 

[jbo120]

I figured out the first problem but I'm still having trouble with the second. Here's what I have so far...(you're image of the problem was correct)

(3)/(3^-1x^2)-1) is this simplified or is there more I can do, or am I completely wrong

Sorry, I don't know how to show my work and get it from the paper to the computer.