PLEASE HELP: It cost $8.31 to power one laptop computer for one year. How much does it cost to power 10 for one week? ROUND to t
2 answers:
- For 1 year or 365 days, to power 1 laptop computer, it costs $8.31.
- For 1 day, to power 1 laptop computer, it costs $
- For 1 week or 7 days, to power 1 laptop computer, it costs $
- For 1 week, to power 10 laptop computers, it costs $
<u>A</u><u>nswer:</u>
<u>$</u><u> </u><u>1</u><u>.</u><u>5</u><u>9</u><u>.</u>
Hope you could get an idea from here.
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<h3>Answer:</h3>
x/tan(x) is an even function
sec(x)/x is an odd function
<h3>Explanation:</h3><em>x/tan(x)</em>
For f(x) = x/tan(x), consider f(-x).
... f(-x) = -x/tan(-x)
Now, we know that tan(x) is an odd function, so tan(-x) = -tan(x). Using this, we have ...
... f(-x) = -x/(-tan(x)) = x/tan(x) = f(x)
The relation f(-x) = f(x) is characteristic of an even function, one that is symmetrical about the y-axis.
_____
<em>sec(x)/x</em>
For g(x) = sec(x)/x, consider g(-x).
... g(-x) = sec(-x)/(-x)
Now, we know that sec(x) is an even function, so sec(-x) = sec(x). Using this, we have ...
... g(-x) = sec(x)/(-x) = -sec(x)/x = -g(x)
The relation g(-x) = -g(x) is characeristic of an odd function, one that is symmetrical about the origin.