Question

Solve this function for me: g (x) = a log4 (b(x - h)) + k . It passes through the points (x,y) (5, 4.5) and (13, 3.5)

288

likes
1439 views

Answer to a math question Solve this function for me: g (x) = a log4 (b(x - h)) + k . It passes through the points (x,y) (5, 4.5) and (13, 3.5)

Expert avatar
Dexter
4.7
108 Answers
We are given the function g(x) = a\log_{4}(b(x-h)) + k and two points that the function passes through: (5, 4.5) and (13, 3.5).

Using the point (5, 4.5), we get:
4.5 = a\log_{4}(b(5-h)) + k

And using the point (13, 3.5), we get:
3.5 = a\log_{4}(b(13-h)) + k

Now, we have a system of two equations:
\begin{cases}\begin{cases}\end{cases}

Subtracting the second equation from the first:
4.5 - 3.5 = a(\log_{4}(5h) - \log_{4}(13h))
1 = a(\log_{4}(\frac{5h}{13h}))
1 = \log_{4}(\frac{5}{13})a
a = \frac{1}{\log_{4}(\frac{5}{13})}

Then, substitute back to solve for k :
4.5 = \frac{1}{\log_{4}(\frac{5}{13})} \log_{4}(5h) + k
4.5 = \frac{\log_{4}(5h)}{\log_{4}(\frac{5}{13})} + k
4.5 = \log_{\frac{5}{13}}(5h) + k
4.5 = \frac{\ln(5h)}{\ln(\frac{5}{13})} + k
4.5 = \frac{\ln(5) + \ln(h)}{\ln(\frac{5}{13})} + k
4.5 = \frac{\ln(5) + \ln(h)}{\ln(5) - \ln(13)} + k
4.5 = \frac{\ln(5h)}{\ln(5) - \ln(13)} + k
4.5 = \log_{5/13}(5h) + k
4.5 = \log_{5/13}(5) + \log_{5/13}(h) + k
4.5 = 1 + \log_{5/13}(h) + k
3.5 = \log_{5/13}(h) + k
3.5 -1 = \log_{5/13}(h)
2.5 = \log_{5/13}(h)
h = \left( \frac{5}{13} \right)^{2.5}

Therefore, the values of the constants a , b , h , and k are:
a = \frac{1}{\log_{4}\left(\frac{5}{13} \right)}
h = \left(\frac{5}{13}\right)^{2.5}

\textbf{Answer:} The values of the constants a and h are a = \frac{1}{\log_{4}\left(\frac{5}{13} \right)} and h = \left(\frac{5}{13}\right)^{2.5} .

Frequently asked questions (FAQs)
Find the real root(s) of the equation x^3 + 2x^2 - x + 1 = 0.
+
What is the mathematical condition for two triangles to be equal in terms of shape and size?
+
Math question: Find the 3rd derivative of f(x) = 3x^4 - 2x^3 + 5x^2 - 7x + 2.
+
New questions in Mathematics
To calculate the probability that a player will receive the special card at least 2 times in 8 games, you can use the binomial distribution. The probability of receiving the special card in a single game is 1/4 (or 25%), and the probability of not receiving it is 3/4 (or 75%).
Revenue Maximization: A company sells products at a price of $50 per unit. The demand function is p = 100 - q, where p is the price and q is the quantity sold. How many units should they sell to maximize revenue?
what is 456456446+24566457
4x567
Suppose 56% of politicians are lawyers if a random sample of size 564 is selected, what is the probability that the proportion of politicians who are lawyers will differ from the total politicians proportions buy more than 4% round your answer to four decimal places
How many anagrams of the word STROMEC there that do not contain STROM, MOST, MOC or CEST as a subword? By subword is meant anything that is created by omitting some letters - for example, the word EMROSCT contains both MOC and MOST as subwords.
Calculate the value of a so that the vectors (2,2,−1),(3,4,2) and(a,2,3) are coplanar.
The market for economics textbooks is represented by the following supply and demand equations: P = 5 + 2Qs P = 20 - Qd Where P is the price in £s and Qs and Qd are the quantities supplied and demanded in thousands. What is the equilibrium price?
How much does the average college student spend on food per month? A random sample of 50 college students showed a sample mean $670 with a standard deviation $80. Obtain the 95% confidence interval for the amount college students spend on food per month.
Professor Vélez has withdrawn 40 monthly payments of $3,275 from her investment account. If the investment account yields 4% convertible monthly, how much did you have in your investment account one month before making the first withdrawal? (Since you started making withdrawals you have not made any deposits.)
Next%C3%B3n%2C+we+are+given+a+series+of+Tri%C3%A1angles+Right%C3%A1angles+%3Cbr%2F%3Ey+in+each+one+of+them+ are+known+2%28two%29+measurements+of+sides.+%3Cbr%2F%3Elet's+determine+all+trigonom%C3%A9tric+ratios.
cube root of 56
Determine the Linear function whose graph passes through the points (6, -2) and has slope 3.
The blood types of individuals in society are as follows: A: 30%, B: 25%, AB: 20%, 0: 25%. It is known that the rates of contracting a certain disease according to blood groups are as follows: A: 7%, B: 6%, AB: 7%, 0: 4%. Accordingly, if a person selected by chance is known to have this disease, what is the probability of having blood group O?
If sin A=0.3 and cos A=0.6, determine the value of tan A.
A post office has three categories of letters: 60% are from businesses, 30% are individual mail, and the remaining 10% are government mail. 5% of the letters from businesses have address errors, 10% of the individual mail has address errors, while 1% of the government mail has address errors. If we receive a letter with an address error, what is the probability that it is individual mail?"
Write the inequality in the form of a<x<b. |x| < c^2
a coffee shop has 9 types of creamer and 11 types of sweetener. In how any ways can a person make their coffee?
3(x-4)=156
Sarah is lining a square tray with 1 inch square tiles. the side length of the tray is 9 inches. How many tiles does Sarah need?