The question: I need help in finding if is decreasing. I found that . Then I made which turns out to be but when I graph it, f(x) is still increasing at . What am I doing wrong?
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Originally Posted by s3n4te The question: I need help in finding if is decreasing. I found that . Then I made which turns out to be but when I graph it, f(x) is still increasing at . What am I doing wrong? But your sum starts at so you only need to consider values of
Originally Posted by danny arrigo But your sum starts at so you only need to consider values of Thanks for the reply. I know, but I'm just puzzled why it's not decreasing at
Originally Posted by s3n4te Thanks for the reply. I know, but I'm just puzzled why it's not decreasing at ... at ... is undefined there ... is not decreasing at since there.
Originally Posted by s3n4te Thanks for the reply. I know, but I'm just puzzled why it's not decreasing at Your derivative (for ) and for your denominator is negative make the entire expression positive.
Originally Posted by skeeter ... at ... is undefined there ... is not decreasing at since there. but if you make ... doesn't that mean right after it should decrease?
Originally Posted by s3n4te but if you make ... doesn't that mean right after it should decrease? between the two critical values, and is ... , which indicates y is increasing on that interval.
Originally Posted by skeeter between the two critical values, and is ... , which indicates y is increasing on that interval. Cool, but how am I supposed to figure that out with the equality test ?
Originally Posted by s3n4te Cool, but how am I supposed to figure that out with the equality test ? Never heard of the "equality" test. How do you do an "equality" test using an inequality? Do you know the first derivative and second derivative tests for extrema?
Originally Posted by skeeter Never heard of the "equality" test. How do you do an "equality" test using an inequality? Do you know the first derivative and second derivative tests for extrema? oops sorry I meant inequality :P Yea but that was last term.... OH I get it now lol Thanks for your help skeeter!
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