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Questions Answered

elizabethann509:
Group Title
In an inequality, if the number is already negative and when I solve it it's still negative do I have to flip the sign?
For example:
…
 updated one year ago
 1 reply
 No Medals Yet
Mathematics

mariacampbell28:
Group Title
Select the property that allows the statement 3 = x to be written x = 3.
 updated one year ago
 1 reply
 No Medals Yet
Mathematics

frx:
Group Title
Let \[f(x) = x^2  2x +1 \] use the epsilondelta definition to show that: \[\lim_{x \rightarrow 3} f(x) = 4\]
I've come up with this:
…
 updated one year ago
 1 reply
 No Medals Yet
Mathematics

chrsimmo:
Group Title
Does anyone know how to solve this equation:
y+ln(y)=1
 updated one year ago
 2 replies
 No Medals Yet
Mathematics

chrisjas:
Group Title
Hi can someone please help me with the following derivative: y = (sec x +3 ln tan x)^1/4.
 updated one year ago
 1 reply
 No Medals Yet
Mathematics

chrisjas:
Group Title
Hi can someone help me with the following derivative: y=(sec x + ln tan x)^1/4.
 updated one year ago
 1 reply
 No Medals Yet
Mathematics

nexis:
Group Title
Why is ln(1/2) = ln(2)
http://ocw.mit.edu/courses/mathematics/1801scsinglevariablecalculusfall2010/partbimplicitdifferentiatio…
 updated one year ago
 3 replies
 2 Medals
Mathematics

MartinLaw:
Group Title
I am struggling to figure out the 1F7B/C questions in problem set 1, the solution given is not helping me and I can't even begin to see th…
 updated one year ago
 3 replies
 2 Medals
Mathematics

JingleBells:
Group Title
Problem Set 1, 1H3 (c), Can someone help me with this? The solution y=[e^x+(e^x^2+4x^x)^1/2]/2
Is there a straight forward way to deduce…
 updated one year ago
 6 replies
 No Medals Yet
Mathematics

david1984:
Group Title
session 1: worked Example : with Mathlet : I dont understand the (C) part of every 3 questions ( from question 1 to 3 ).How to find the valu…
 updated one year ago
 1 reply
 No Medals Yet
Mathematics

TiaW:
Group Title
Which of the following is the rational exponent expression of http://learn.flvs.net/webdav/assessment_images/educator_algebra2_v10/04_04c_04…
 updated one year ago
 4 replies
 1 Medal
Mathematics

Frankk:
Group Title
I'm checking MIT maths course and I'm currently studying Implicit Differentiation and Inverse Functions (http://ocw.mit.edu/courses/mathemat…
 updated one year ago
 1 reply
 1 Medal
Mathematics

Myammecutie:
Group Title
Together a computer, monitor, and printer cost $1,935. The monitor cost $400 less than the computer, and the printer cost $50 more than the …
 updated one year ago
 18 replies
 1 Medal
Mathematics

BabyBoy1:
Group Title
There are two consecutive even numbers such that six times the smaller number minus five times the greater number is 2. What is the small…
 updated one year ago
 3 replies
 1 Medal
Mathematics

nexis:
Group Title
If someone could explain the answer to 1J2 on the first assignment (http://ocw.mit.edu/courses/mathematics/1801scsinglevariablecalculus…
 updated one year ago
 5 replies
 2 Medals
Mathematics

phatman:
Group Title
how does one determine MULTIPLE min/max points in a periodic function?
 updated one year ago
 1 reply
 2 Medals
Mathematics

joneshead:
Group Title
Sum of rectangles inequality: In the definition of the integral of x^2 between 0 and b, a geometric example was used. The largest square pyr…
 updated one year ago
 2 replies
 1 Medal
Mathematics

Kumbakonam:
Group Title
In session 15 recitation video (Graphing the Arctan Function), can you guys tell me the detailed solution of using \frac{d}{dx} \tan{x} = \s…
 updated one year ago
 4 replies
 1 Medal
Mathematics

unkabogable:
Group Title
Find the dimensions of largest rectangle w/ maximum area inscribed in a semicircle with radius r.
What equations am I gonna use in here? He…
 updated one year ago
 3 replies
 No Medals Yet
Mathematics

Scott*:
Group Title
Stuck on the algebra portion of 2C13.
 updated one year ago
 2 replies
 No Medals Yet
Mathematics

Luvgunn:
Group Title
I need more work on antiderivatives. Any suggestions on where to find more exercises?
 updated one year ago
 2 replies
 No Medals Yet
Mathematics

Scott*:
Group Title
I looking for direction on this question: 1A6: Express in the form Asin(x+c). For a) sinx +√3cosx & b) sinxcosx. I'm thinking I need the …
 updated 2 years ago
 2 replies
 2 Medals
Mathematics

lukeryberg21:
Group Title
Hey guys, do the solutions for the final exam exist? Or, where can I get solutions to check my answers? I have just completed the final on m…
 updated one year ago
 2 replies
 No Medals Yet
Mathematics

eamier:
Group Title
prove that the derivative of log x base a equal to1/(a log x)
 updated 2 years ago
 1 reply
 1 Medal
Mathematics

kozlowse:
Group Title
How do you solve final exam question 3b? lim as x >3^.5 of (arctan(x)  pi/3) / (x  3^.5)?
 updated 2 years ago
 2 replies
 1 Medal
Mathematics

christianm:
Group Title
In this example from Session 54 (end of the first video excerpt), the lecturer switches the order of integration and a negative sign at the …
 updated 2 years ago
 2 replies
 No Medals Yet
Mathematics

christianm:
Group Title
Hi,
I'm a little confused about the recitation in Session 15 (Derivative of the Arccos function). Why does Joel draw the angle arccos(x) …
 updated 2 years ago
 1 reply
 1 Medal
Mathematics

mrjoules:
Group Title
what is the difference between capital delta y/capital delta x and dy/dx?
 updated 2 years ago
 4 replies
 1 Medal
Mathematics

Mtakle:
Group Title
I'm working problem set 2  1H1. I get part a, but cannot understand part b. I don't understand where the equation for lamda came from in…
 updated 2 years ago
 1 reply
 No Medals Yet
Mathematics

nickb:
Group Title
Section 1, Part A, Session 4 worked example: why does sin2x derive to 2cos2x? I don't understand any process that would benefit from somehow…
 updated 2 years ago
 1 reply
 No Medals Yet
Mathematics
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