Precalculus Solutions | Expert Assistance for Problems & Examples

If $f (x) = (a x + b) (x^{5} + 1) - 5 x - 1$ is divisible by $x^{2} + 1$ . Then the value of $2 a + 3 b$

Riley Yates 2022-05-20

Evaluate $\sum_{k \geq 0} (- 1)^{k} {(\binom{n}{k})}^{2}$ using sign reversing involutions. When $n$ is odd, the problem is trivial : let $[n] = {1, 2, \dots, n}$ consider all pairs of subsets ${(A, B) \in 2^{[n]} \times 2^{[n]} : | A | = | B |}$ , and $(A, B)$ has sign $(- 1)^{| A |}$ and the sign-reversing involution is $(A, B) \to ([n] - A, [n] - B)$ . Any hints on how to approach this problem for even $n$ will be appreciated.

Nylah Burnett 2022-05-20

Show that $\frac{1 + \sin A}{\cos A} + \frac{\cos B}{1 - \sin B} = \frac{2 \sin A - 2 \sin B}{\sin (A - B) + \cos A - \cos B}$

Nicholas Cruz 2022-05-20

Spotting substitution in $\int \frac{1}{(t + \cos α)^{2} + \sin^{2} α}$

Defensorentx9 2022-05-20

Sum $- 6 s^{4} + 5 s^{3} + 3 s + 1$ and $- 5 s^{3} + 3 s^{2} - 7 s$ .

Kendall Oneill 2022-05-20

Sum $y^{4} + 3 y^{3} - y + 5$ and $5 y^{3} - 5 y^{2} + 7 y$ .

Jaylene Duarte 2022-05-20

Sum $- 3 w^{4} - w^{3} - 2 w^{2} + 7 w + 3$ and $- 4 w^{4} + 3 w^{3} - 4 w^{2} - 5 w - 7$ .

indimiamimactjcf 2022-05-20

Sum $3 x^{4} + 4 x^{3} - 6 x - 2$ and $3 x^{4} + 7 x^{3} + 4 x^{2} - 6 x + 7$ .

Peia6tvsr 2022-05-20

$(2 a^{4} + 2 a^{3} + 3 a + 4) + (a^{4} + 4 a^{3} + 2 a^{2} - 4 a + 2) = ?$

tiyakexdw4 2022-05-20

Calculate the value of $- 5 v^{5} + 7 v^{4} + 2 v^{3} + 3 v^{2} + 3 v + 1$ at v=-7.

pevljivuaosyc 2022-05-20

What is the value of the polynomial $6 s^{5} + 2 s^{4} - 3 s^{3} + 7 s^{2} + s$ at s=-4?

arbixerwoxottdrp1l 2022-05-20

Compute the value of $- u^{5} + 5 u^{4} + 5 u^{2} - 2 u + 5$ at u=7.

Marianna Stone 2022-05-20

If $y = 9 \sec^{2} x + 16 \csc^{2} x$ ,find the minimum value of y , $y, \forall x \in R$

Walker Guerrero 2022-05-20

How do I evaluate the sum $\sum_{n = 1, 3, 5, . . .}^{\infty} \frac{1}{n^{4}}$

Denisse Valdez 2022-05-20

How to calculate $\sum_{k = 0}^{n} a^{k} \sin (k x)$ ?

Jazmine Bruce 2022-05-20

Which value is correct for $\sin^{- 1} (\frac{- \sqrt{3}}{2})$ , $\frac{4 π}{3}$ or $\frac{5 π}{3}$ ?
As far as I remember, both $\frac{4 π}{3}$ and $\frac{5 π}{3}$ are correct for the exact values of $\sin^{-} 1 (\frac{- \sqrt{3}}{2})$ . In symbolab and wolfram, they both showed $\frac{- π}{3}$ , which is equivalent to $\frac{5 π}{3}$ . But in other websites, it's $\frac{4 π}{3}$ . I really got confused. I remember my teacher in Precalculus, she said it's $\frac{4 π}{3}$ . I am now confused. Which is correct?

Jaycee Mathis 2022-05-20

Can the inequality $\sum_{i = 1}^{n} \frac{1}{\sqrt{i}} < 2 \sqrt{n} - 1$ be proved without induction?

Anthony Kramer 2022-05-19

Let $a, b, c \in [0; \frac{π}{2}]$ such that
$\cos a = a; \sin \cos b = b; \cos \sin c = c .$
Put the numbers a,b,c in ascending order

osmane5e 2022-05-19

Why does $\sum_{n = 1}^{\infty} \frac{\cos \frac{1}{n}}{n}$ diverge but $\sum_{n = 1}^{\infty} \frac{\sin \frac{1}{n}}{n}$ converges?

realburitv4 2022-05-19

show that $\sin 15^{\circ} = \frac{\sqrt{3} - 1}{2 \sqrt{2}}$ using $\cos 2 A = 1 - 2 \sin^{2} A$ However I got $\sin 15^{\circ} = \sqrt{\frac{2 - \sqrt{3}}{4}}$ instead.

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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