![sk9600930](/avatars/45772.jpg)
sk9600930
19.08.2019 •
Mathematics
What is the missing circle sequence number 40,,20,10
Solved
Show answers
More tips
- H Health and Medicine What You Need to Know About Nasal Congestion in Infants: Causes, Symptoms, and Treatment...
- A Auto and Moto Mastering One-Movement Parking: All You Need to Know...
- P Photography and Videography Understanding HDR: How It Works and Why You Need It...
- P Photography and Videography How to Choose the Perfect Photo Paper for Your Images?...
- C Computers and Internet How to Choose an Uninterruptible Power Supply (UPS) for Your Computer: Expert Tips...
- S Science and Technology How to choose a home theater system?...
- A Auto and Moto How to Choose a Car Wash? Tips and Recommendations...
- A Animals and plants How ants survive winter: exploring the secrets of their winter life...
- C Construction and repair How to Choose the Best Underfloor Heating?...
- S Sport When is the Champions League final?...
Answers on questions: Mathematics
- M Mathematics How do I solve the equation 6=-w/8...
- M Mathematics What is greater pie of 22/7...
- M Mathematics -1/2 divided by what equals -7/3...
- M Mathematics How do you factor 16-2m^2?...
- M Mathematics Find M angle DEG and M angle GEF...
- M Mathematics Write 2.275 as a mixed number...
- M Mathematics Factor 4x squared-35x+4...
- M Mathematics A young sumo wrestler decided to go on a special high-protein diet to gain weight rapidly. He gained weight at a constant rate. The table compares the wrestlers weight (in...
- M Mathematics Karen grew a pumpkin that weighed 18.9 pounds for the competition at the county fair. Nancy grew a pumpkin that weighed 19.9 pounds. Who grew the largest pumpkin, Karen or...
- M Mathematics T to the power of 2 subtracted by 12w divided by x...
Ответ:
? = 10
Because, the sequence is 40,20,10 and then replay it again
or
40 - 20 = 20
20 - 10 = 10
40 - 20 = 20
20 - 10 = 10
So, ? = 10
Ответ:
Since we want to solve for the variable x, we want to isolate x
a²x + (a - 1) = (a + 1)x ⇒ Distribute x to (a+1). Also, remove parentheses
a²x + a - 1 = ax + x ⇒ Subtract a from both sides
a²x - 1 = ax + x - a ⇒ Add 1 to both sides
a²x = ax + x - a + 1 ⇒ Subtract (ax + x) from both sides
a²x - (ax + x)= ax + x - a + 1 - (ax+x) ⇒ Simplify. Remember that multiplying positive by negative = negative
a²x - ax - x = ax + x - a + 1 - ax - x ⇒ Simplify
a²x - ax - x = -a + 1 ⇒ Factor out the x from a²x - ax - x
x(a² - a - 1) = -a + 1 ⇒ Divide both sides by (a² - a - 1)
x = (-a + 1) / (a² - a - 1)
However, we need to make sure that the denominator does not equal 0. Therefore, you set the denominator = 0 (just use the quadratic formula for this), and it gives that the denominator =0 when a = (1+√5)/2 AND (1-√5)/2
Therefore, the final answer is
x = (-a + 1) / (a² - a - 1) given that a ≠ (1+√5)/2, a ≠ (1-√5)/2