15,254 Answered Questions for the topic precalculus

Precalculus

08/20/23

Don't summed (polynomial roots)^2=(b^2)-2c always and if (b^2)-2c<0, then
given polynomial f(x)=xn+bx(n-1)+cx(n-2)+an-3x(n-3)+...a1x+a0 ,,,,coefficients to xk all real numbersk=0,n integershave n roots xr,1,xr,2,...xr,nit is not hard to show sum (xr,i)2=b2-2c where i is... more
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Precalculus

08/20/23

Use a graphing utility to graph the function. Find the domain and range of the function. (Enter your answers using interval notation.) f(x)= √x²+4
Use a graphing utility to graph the function. Find the domain and range of the function. (Enter your answers using interval notation.) f(x)= √x²+4
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Precalculus

08/19/23

Formula for Parabola
Find a formula for the quadratic function whose graph has its vertex at (1,8) and its y-intercept at y=−2.
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Precalculus

08/19/23

Parabola of a Function
Find b and c so that y=−13x2+bx+c has vertex (2,6). 
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Precalculus Math

08/19/23

Algebra of Functions

Consider the function f(x)=x2+4 and find the following:a) The average rate of change between the points  (−1,f(−1)) and (1,f(1)) . b) The average rate of change between the... more
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Precalculus

08/19/23

Combinations of Functions

Let  f(x)=x^2+4 and  g(x)=6x+7. Evaluate and simplify the following:f(g(x))=
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Precalculus

08/19/23

Combinations of Functions

 Let f(x)=1/x and g(x)=5x+8. Evaluate the following: 1.   (f∘g)(x) = 2.   (g∘f)(x) = 3.   (f∘f)(x) = 4.   (g∘g)(x) =
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Precalculus Math

08/19/23

Graph Transformation

The graph of f(x) contains the point (−1,6). What point must be on each of the following transformed graphs? Enter points as (a,b)(a,b) including the parentheses.(a) The graph of f(x−7) must... more
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Precalculus

08/17/23

Find the solutions of this equation on the interval [0, 2π): sin(3π/2 + x) + sin(3π/2 + x) = -2
please show your work and explain it simply.
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Precalculus

08/17/23

Variable Expressions as Inputs of Function: Question 1
The functions f and g are defined as follows.f (x) = x2 + 9x + 5 and g (x) = 3 / x2 - 2Find f (x-3) and g (- 5 / x).Write your answers without parentheses and simplify them as much as possible.f (x... more
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Precalculus

08/17/23

Velocity Timing
Answer by filling in the blank below, then explain your answer.Starting from rest, an automobile's velocity v (in ft/sec) is given by v = 180t / 2t + 10, where t is the time in seconds after the... more
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Precalculus

08/16/23

Precalculus 12 grade.
F(X)=5x^2-11x-9, find the average rate of change from a=2 to a=2+h
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Precalculus

08/16/23

PRECACULUS 12 GRADE
F(X)= 5X^2-11X-9, FIND THE AVERAGE RATE FROM a=2 to a=2+h i find average 5h+9 , but the says it incorrect. WHAT IS WRONG, I DID NOT UNDERSTAND
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Precalculus

08/16/23

Precalculus 12 grade
F(x)= 5x^2-11x-9 . find average rate from a=2 to a=2+h
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Precalculus

08/16/23

PRECALCULUS, 12 GRADE
Let F(x)= x^2-11, FIND THE AVERADE RATE OF CHANGE FROM a=-4 TO a=-4+h
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Precalculus

08/12/23

Use the matrices below
Use the matrices below to compute the matrix combination of A^2+B^2 A = [-3, -3][8,-1] B = [-10, -2][3,1]
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Precalculus Calculus

08/10/23

Please help me ASAP
It's about sketching the graph based on precalculus and calculus. draw the graph y=(1+e^x)^-2 When I tried to first derivative test, I couldn't see at any point that makes 'f'(x)=0' Does it right?... more
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Precalculus Calculus

08/10/23

Please help me. How I should change ln(t) to "e to the something"?

This problem is about parametric function and I have to eliminate parametric function. x=lnt y=root t I can see that y=e^x/2How does the x=lnt change to "e to the something"?
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Precalculus Math

08/06/23

MATH HW Q:5 TO CHAPTER 6
Find a polynomial with rational coefficients of minimal degree passing through (−2,7) and having zeros1, and 1/2, and 1/2, and 1 − squareroot of 2i, and 2 + squareroot 3𝑖.
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Precalculus

08/05/23

Find a formula for the exponential function passing through the points (-1,2/3 ) and (2,18)
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Precalculus

08/03/23

11^9x =17^-x+5 Write the exact answer using either base-10 or base-e logarithms.

11^9x =17^-x+5 Write the exact answer using either base-10 or base-e logarithms.
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Precalculus

08/03/23

Convert to polar equation
 Convert the following Cartesian equation into a polar equation.y=14x+9
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Precalculus

08/03/23

Precalculus question
Find all solutions to the following equation on the interval [0,pi) without the use of a graphing utility:3cos⁡(t)+4=2.If there are more than one solution, separate them with spaces. If there is no... more
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Precalculus

08/02/23

PRECAL MATH HW chapter 6

Find a polynomial with rational coefficients of minimal degree passing through (−2,7) and having zeros1, 1/2, 1/2, 1 , − squareroot of 2i, 2 + squareroot 3𝑖.
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Precalculus Math

08/02/23

PRECAL MATH HW CHAPTER 6
Approximate the real zero between -1 and 1 accurate to three places for the polynomial 𝑓 (𝑥) = 𝑥^4 − 3𝑥^3 + 1 using the Intermediate Value Theorem as described in these notes.
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