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kap26 [50]
2 years ago
8

Choose Yes or No to tell if the expression is equal to 8 x 40.

Mathematics
1 answer:
devlian [24]2 years ago
3 0
No i don’t think so
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I need help please Asap
s2008m [1.1K]

Answer:

Step-by-step explanation:

1.

Equation one:

x = -5, x = -1 (Both are real)

Equation two:

No real solutions

Equation three:

x = -3 (Real)

Equation four:

No real solutions

2.

The easiest way to figure out if an equation has real solutions is to factor it. If it is factorable, then it has real solutions. If it isn't, then it doesn't have real solutions.

4 0
2 years ago
Find integrate (1/(xsqrt(1+(lnx)^2)),1,e,x) ...?
prohojiy [21]
Note that x² + 2x + 3 = x² + x + 3 + x. So your integrand can be written as 

<span>(x² + x + 3 + x)/(x² + x + 3) = 1 + x/(x² + x + 3). </span>

<span>Next, complete the square. </span>

<span>x² + x + 3 = x² + x + 1/4 + 11/4 = (x + 1/2)² + (√(11)/2)² </span>

<span>Also, for the x in the numerator </span>

<span>x = x + 1/2 - 1/2. </span>

<span>So </span>

<span>(x² + 2x + 3)/(x² + x + 3) = 1 + (x + 1/2)/[(x + 1/2)² + (√(11)/2)²] - 1/2/[(x + 1/2)² + (√(11)/2)²]. </span>

<span>Integrate term by term to get </span>

<span>∫ (x² + 2x + 3)/(x² + x + 3) dx = x + (1/2) ln(x² + x + 3) - (1/√(11)) arctan(2(x + 1/2)/√(11)) + C </span>

<span>b) Use the fact that ln(x) = 2 ln√(x). Then put u = √(x), du = 1/[2√(x)] dx. </span>

<span>∫ ln(x)/√(x) dx = 4 ∫ ln u du = 4 u ln(u) - u + C = 4√(x) ln√(x) - √(x) + C </span>

<span>= 2 √(x) ln(x) - √(x) + C. </span>

<span>c) There are different approaches to this. One is to multiply and divide by e^x, then use u = e^x. </span>

<span>∫ 1/(e^(-x) + e^x) dx = ∫ e^x/(1 + e^(2x)) dx = ∫ du/(1 + u²) = arctan(u) + C </span>

<span>= arctan(e^x) + C.</span>
4 0
3 years ago
Explain the steps you would take to find the quotient of<br> 1<br> 3<br> ÷ 4<br> 3
nikdorinn [45]

Answer:

the question looks weird can u fix it

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
What is i divided by i<br><img src="https://tex.z-dn.net/?f=i%20%5Cdiv%20i" id="TexFormula1" title="i \div i" alt="i \div i" ali
kiruha [24]

i \div i still follows the property of x \div x = 1 for any non-zero x.

Therefore, the answer is 1.

7 0
3 years ago
Hayden built a wooden sculpture with the dimensions
lisabon 2012 [21]

Answer:

c

Step-by-step explanation:

took test & got it right

8 0
2 years ago
Read 2 more answers
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