47 Answered Questions for the topic Interval

Interval Calculus

04/07/21

*integral sign* (3x^3-2x^2+5)dx
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05/01/20

p and q are complex numbers such that p=2/5x+1, q=x+1, and p+q=3x+2. What interval must x fall?
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10/09/19

Minimum and Maximum at a point
Find the minimum and maximum values of the function, x^3-6x^2+8 on the interval [1,3] by comparing values at the critical point s and end points.
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09/02/18

Inequality/interval notation question
Let S be (−∞,3]∪[15,∞) Then S can also be described in set notation by the inequality |x−a|≥b   a=? b=?
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06/27/18

Given the function value and the quadrant restirction, find θ?
Sin θ=-0.9744   (270°, 360°)
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02/07/18

Which of the following must be true?
For the differentiable function on the interval [1, 3] f(1)=-2   f(2)=4  f(3)=-2 Which of the following must be true? I. There must be at least one point on the interval where is zero.II. There... more
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Interval Equations

10/20/17

Show that an equation has a solution
show that (x^3)/2=sin [ πx/4 + π/2) has a solution over the interval [0,2] 
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Interval

08/23/17

Write the set of points from −6 to −1 but excluding −4 and −1 as a union of intervals:
How do I do this??
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08/09/17

Co ordinate geometry
(a) Find the gradient of the interval AB, where A = (3, 0) and B = (5, −2).(b) Find a if AP ⊥ AB, where P = (a, 5).(c) Find the point Q(b, c) if B is the midpoint of AQ.(d) Find d if the interval... more
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Interval Trigonometry Pi

05/25/17

Solve the following in the interval of [0,2π)
1. 4 cos x * 2 √ 3 = 0 2. 2sin^2 x - sin x = 1 3. cos^2 x = cos x
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02/27/17

Solve the equation on the interval [0,360) 2sin^2(x)+3sin(x)+1=0
As well as this one below. I'm just having trouble understanding the process and steps.     Find all the solutions in [0,2pi) sin^2(t)-cos^2(t)=0 3. Solve the equation on the interval [0,360)  ... more
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02/27/17

I'm having trouble with several questions listed below:
1. Find the exact value of cos(t/2) if sin(t) = -7/25 and pi < t < 3pi/2    2. Find all the solutions in the interval [0,360]        cos(2x)= - sqrt3/2   
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12/17/16

Solve the given equation over the interval [0, 2π): 2 cos x − sin2 x = cos2 x.
Solve the given equation over the interval [0, 2π): 2 cos x − sin2 x = cos2 x.   A. x=(5pi/6) and x=(7pi/6) B. x=(2pi/3) and x=(4pi/3) C. x=(pi/6) and x=(11pi/6) D. x=(pi/3) and... more
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Interval Tangent Cosine

07/17/16

solve tan(x/2)=sqrt3/3
solve on the interval [0,2(pie)).  The square root is just on the top 3 not the whole fraction.
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04/20/16

Statistics: A recent study of 40 randomly selected children ages 6-8 found that the mean length of time spent watching television
A recent study of 40 randomly selected children ages 6-8 found that the mean length of time spent watching television each week was 12 hours and the standard deviation was 2.5 hours. The mean time... more
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04/14/16

did I solve this right?
In a recent sample of 84 used car sales costs, the sample mean was $6,425 with a standard deviation of $3,156. Assume the underlying distribution is approximately normal. i. Construct a 95%... more
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04/13/16

Did I solve this correctly?
You were interested in how long the average psychology major at your college studies per night, so you asked 10 psychology majors to tell you the amount they study. They told you the following... more
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Interval Solutions Cosine Sine

11/22/15

2sin(pi/3x) =sqrt2
Find all solutions on the interval 0< (or equal to) theta < 2pi   Help! Show steps please. thanks
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11/18/15

Solving For X In The Interval
Solve for x in the interval...   0<x<2π: 3sin2(2x+1)+2sin(2x+1)-1=0   My teacher says there should be 6 answers.  I have a TI-84 calculator, so maybe there's a way to plug this in to find... more
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10/21/15

Calculus Homework- Function & Absolute Max and Min
Consider the function f(x)=2x2−2x+6, 0≤x≤6. The absolute maximum of f(x) (on the given interval) is _________ and the absolute minimum of f(x) (on the given interval) is __________.
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10/19/15

Fuctions, Interval, Increasing/ Decreasing, Concave up/ Concave Down (Using Calculus)
Consider the function f(x)=3x+6/6x+3                                                For this function there are two important intervals: (−∞,A) and (A,∞) where the function is not defined at... more
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08/12/15

find area under curve
Using the left-had approximation method with 5 equal subintervals, find the area under the curve f(x)=√(1+x3) on the interval [0,1].   a.) 1.074 b.) 1.156 c.) 2.356 d.) 1.110
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Interval Equation Cosine Theta

05/27/15

Solve each equation on the interval
0 less than or equal to theta less than or equal to 2pi cos(theta)=1/2 cos(theta)=-square root 3/2
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Interval Equation Sine Sin

05/08/15

sin^2x=5 has how many solutions on the interval 0 less than or equal to x less than or equal to 2pi?
A.0 B.2 C.1 D.Infinity   I need a step by step on how to do this.
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Interval Series Notation

03/19/15

Find the value of x so that the series below converges
Find the value of x so that the series below converges  infinity Σ n=1 (xn/10n)    What is the answer in interval notation?
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