02/28/18

limit as x approaches 3 from the left of (x+1) /(X^2-x-6)
evaluate analytically.
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01/16/18

True or False
The equation f(x) = 4x4 + 4x2 + 9x – 2 can have at most four distinct real roots.
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01/08/18

Define two functions c(x) = max{x - a,0}, p(x) = max{a-x,0}. Prove that c(x) - p(x) = x - a
Define two functions c(x) = max{x - a,0}, p(x) = max{a-x,0}. Prove that c(x) - p(x) = x - a
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12/10/17

Can you help me find a counterexample to the following;
For a subset x⊆R: 'X is dense in R implies that x∩Q≠Ø
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11/27/17

sin(A-B) over sinA-SinB equals cotB-cotA
establish an identity
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11/20/17

I need help with writing a proof about cardinality. Please look at description for more detail.
Let N^N(Nautral Numbers)={f:f|N->N}.   a. Give two elements of N^N   b. Prove that Aleph Zero <|N^N|
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11/15/17

Is f one-to-one? Is f onto? Prove or give a counterexample.
Define f(x) : P({a,b,c}) →N as follows: for all A ∈P({a,b,c}), f(A) = the number of elements in A. ( P is a power set.) Is f one-to-one? Prove or give a counterexample. Is f onto? Prove or give... more
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11/14/17

Please find domain and solution
3^x+ 3^(1-x)<4
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11/09/17

perpendicular line that passes through (5, 1)
What is the equation in 
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10/08/17

if limit of f(x) as x approaches a exists, does the limit of |f(x)|exist as as x approaches a? vice versa?
a) If lim f(x) exists, them lim |f(x)| exists        x>a                         x>a   b) if lim |f(x)| exists, then lim f(x) exists         x>a                         ... more
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05/03/17

Find an example of a set A and functions f :A→A and g:A→A such that f◦g=idA but g ◦ f ̸= idA
Find an example of a set A and functions f :A→A and g:A→A such that f◦g=idA but  g ◦ f does not equal idA. I am not sure what idA means or an example for this
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03/07/17

f(x)=10^x and g(x)=-4(10^x)
what is the domain and range and the y-intercept?  
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04/07/16

how many elements are in the set ...
how many elements are in the set {(x,y)∈ AxA|x+y is even} if A={1,2,3,4,5}. Please explain all steps. Thank You!!
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03/30/16

Show that if ax + by = p, then gcd(a,b) = 1 or gcd(a,b) = p
Suppose that a,b,x,y are integers and that p is a prime. Show that if ax + by = p, then gcd(a,b) = 1 or gcd(a,b) = p
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12/16/15

The domain of the function f(x)=3x-6/x is {-3, -1, 2, 4, 5}. What is the function's range?
this is a test and i need help
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11/17/15

complex analysis
if limn→∞ zn = A ,prove that  limn→∞ (z1+z2+...........zn) = A   please help me sir please
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02/21/15

Differentiate: f(x) = sin(x)cos(x) + 4(3x+2)^5 + (2^x)/sqrt(x)
please help me!
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