Precalculus Solutions | Expert Assistance for Problems & Examples

Sketch a graph of the function. Use transformations of functions whenever possible. $f (x) = - {(x - 1)}^{4}$

Ernstfalld 2021-03-18

Sketch graphs of each of the following polynomial functions. Be sure to label the x- and they-intercepts of each graph. $a . y = x (2 x + 3) (2 x - 5) b . y = {(11 - 2 x)}^{2} (x - 2)$

Lewis Harvey 2021-03-12

Let a linear sytem of equations Ax=b where
$A = (\begin{matrix} 4 & 2 & - 2 \\ 2 & 2 & - 3 \\ - 2 & - 3 & 14 \end{matrix}), b = {(\begin{matrix} 10, 5, 4 \end{matrix})}^{T}$
in case we solve this equation system by using Dolittle LU factorization method , find Z and X matrices

Kyran Hudson 2021-03-12

Find three $2 \times 2$ idempotent matrices. (Recall that a square matrix A is idempotent when $A^{2} = A$ )

Rivka Thorpe 2021-03-12

Begin with the graph of y = ln x and use transformations to sketch the graph of each of the given functions. $y = \ln (2 - x)$

Amari Flowers 2021-03-11

Write each of the following linear combinations of columns as a linear system of the form in (4):
$a) x_{1} [\begin{matrix} 2 \\ 0 \end{matrix}] + x_{2} [\begin{matrix} 1 \\ 3 \end{matrix}] = [\begin{matrix} 4 \\ 2 \end{matrix}]$
$b) x_{1} [\begin{matrix} 1 \\ 2 \\ - 1 \end{matrix}] + x_{2} [\begin{matrix} 0 \\ 1 \\ 2 \end{matrix}] + x_{3} [\begin{matrix} 3 \\ 4 \\ 5 \end{matrix}] + x_{4} [\begin{matrix} 1 \\ 3 \\ 4 \end{matrix}] = [\begin{matrix} 2 \\ 5 \\ 8 \end{matrix}]$

necessaryh 2021-03-11

Determine the absolute value of each of the following complex numbers:
a. $z = 5 + 12 i$
b. $2 - 3 i .$

floymdiT 2021-03-11

Use cramer's rule to determine the values of $I_{1}, I_{2}, I_{3}$ and $I_{4}$
$[\begin{matrix} 13.7 & - 4.7 & - 2.2 & 0 \\ - 4.7 & 15.4 & 0 & - 8.2 \\ - 2.2 & 0 & 25.4 & - 22 \\ 0 & - 8.2 & - 22 & 31.3 \end{matrix}] [\begin{matrix} I_{1} \\ I_{2} \\ I_{3} \\ I_{4} \end{matrix}] = [\begin{matrix} 6 \\ - 6 \\ 5 \\ - 9 \end{matrix}]$

Albarellak 2021-03-09

Use the formula for the sum of a geometric series to find the sum, or state that the series diverges.
$\frac{25}{9} + \frac{5}{3} + 1 + \frac{3}{5} + \frac{9}{25} + \frac{27}{125} + \dots$

lwfrgin 2021-03-09

Write the series and find the sum of the series of sigma notation.
$\sum_{i = 0}^{6} \frac{i}{i - 1}$

Khadija Wells 2021-03-09

Evaluate the following
$\int \csc^{6} u d u$

Chardonnay Felix 2021-03-09

Given that
$f (x, y, z) = x y + z,$
$x = s^{2},$
$y = s t,$
$z = t^{2},$
find the composite function.

SchachtN 2021-03-09

Perform the indicated matrix operations:
$[\begin{matrix} 5 & 4 \\ - 3 & 7 \\ 0 & 1 \end{matrix}] - [\begin{matrix} - 4 & 8 \\ 6 & 0 \\ - 5 & 3 \end{matrix}]$

Rivka Thorpe 2021-03-09

Given matrix A and matrix B. Find (if possible) the matrices: (a) AB (b) BA.
$A = [\begin{matrix} 1 & - 1 & 1 \\ 5 & 0 & - 2 \\ 3 & - 2 & 2 \end{matrix}], B = [\begin{matrix} 1 & 1 & 0 \\ 1 & - 4 & 5 \\ 3 & - 1 & 2 \end{matrix}]$

naivlingr 2021-03-09

Use the graphing calculator to solve if possible
$A = [\begin{matrix} 1 & 0 & 5 \\ 1 & - 5 & 7 \\ 0 & 3 & - 4 \end{matrix}] B = [\begin{matrix} 3 & - 5 & 3 \\ 2 & 3 & 1 \\ 4 & 1 & - 3 \end{matrix}] C = [\begin{matrix} 5 & 2 & 3 \\ 2 & - 1 & 0 \end{matrix}] D = [\begin{matrix} 5 \\ - 3 \\ 4 \end{matrix}]$
Find the value in row 2 column 3 of $A B - 3 B$

Chardonnay Felix 2021-03-08

(square roots of the identity matrix) For how many $2 \times 2$ matrices A is it true that $A^{2} = I$ ? Now answer the same question for $n \times x$ n matrices where $n > 2$

postillan4 2021-03-08

Confirm that the Integral Test can be applied to the series. Then use the Integral Test to determine the convergence or divergence of the series.
$\sum_{n = 1}^{\infty} \frac{1}{n + 3}$

Yulia 2021-03-07

Can you please help with finding an inverse of an elementary matrices?

Ayaana Buck 2021-03-07

Find the following matrices:
a) $A + B$ .
(b) $A - B$ .
(c) $- 4 A$ .
$A = [\begin{matrix} 2 & - 10 & - 2 \\ 14 & 12 & 10 \\ 4 & - 2 & 2 \end{matrix}], B = [\begin{matrix} 6 & 10 & - 2 \\ 0 & - 12 & - 4 \\ - 5 & 2 & - 2 \end{matrix}]$

Harlen Pritchard 2021-03-07

Use the definition of the matrix exponential to compute eA for each of the following matrices:
$A = (\begin{matrix} 1 & 1 \\ 0 & 1 \end{matrix})$

Precalculus problems and solutions are hard to find online even though this topic is quite popular among college students majoring in Engineering. Keeping this fact in mind, we decided to provide you with a list of questions and answers that will help you with various precalculus problems. Regardless if it is related to equations or any other problem, these precalculus problems and composite functions examples and solutions below will help you see the logic and compare solutions as you check your original task.

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