<u>Answer-</u>
At
the curve has maximum curvature.
<u>Solution-</u>
The formula for curvature =
![K(x)=\frac{{y}''}{(1+({y}')^2)^{\frac{3}{2}}}](https://tex.z-dn.net/?f=K%28x%29%3D%5Cfrac%7B%7By%7D%27%27%7D%7B%281%2B%28%7By%7D%27%29%5E2%29%5E%7B%5Cfrac%7B3%7D%7B2%7D%7D%7D)
Here,
![y=4e^{x}](https://tex.z-dn.net/?f=y%3D4e%5E%7Bx%7D)
Then,
![{y}' = 4e^{x} \ and \ {y}''=4e^{x}](https://tex.z-dn.net/?f=%7By%7D%27%20%3D%204e%5E%7Bx%7D%20%5C%20and%20%5C%20%7By%7D%27%27%3D4e%5E%7Bx%7D)
Putting the values,
![K(x)=\frac{{4e^{x}}}{(1+(4e^{x})^2)^{\frac{3}{2}}} = \frac{{4e^{x}}}{(1+16e^{2x})^{\frac{3}{2}}}](https://tex.z-dn.net/?f=K%28x%29%3D%5Cfrac%7B%7B4e%5E%7Bx%7D%7D%7D%7B%281%2B%284e%5E%7Bx%7D%29%5E2%29%5E%7B%5Cfrac%7B3%7D%7B2%7D%7D%7D%20%3D%20%5Cfrac%7B%7B4e%5E%7Bx%7D%7D%7D%7B%281%2B16e%5E%7B2x%7D%29%5E%7B%5Cfrac%7B3%7D%7B2%7D%7D%7D)
Now, in order to get the max curvature value, we have to calculate the first derivative of this function and then to get where its value is max, we have to equate it to 0.
![{k}'(x) = \frac{(1+16e^{2x})^{\frac{3}{2} } (4e^{x})-(4e^{x})(\frac{3}{2}(1+e^{2x})^{\frac{1}{2}})(32e^{2x})}{(1+16e^{2x} )^{2}}](https://tex.z-dn.net/?f=%7Bk%7D%27%28x%29%20%3D%20%5Cfrac%7B%281%2B16e%5E%7B2x%7D%29%5E%7B%5Cfrac%7B3%7D%7B2%7D%20%7D%20%284e%5E%7Bx%7D%29-%284e%5E%7Bx%7D%29%28%5Cfrac%7B3%7D%7B2%7D%281%2Be%5E%7B2x%7D%29%5E%7B%5Cfrac%7B1%7D%7B2%7D%7D%29%2832e%5E%7B2x%7D%29%7D%7B%281%2B16e%5E%7B2x%7D%20%29%5E%7B2%7D%7D)
Now, equating this to 0
![(1+16e^{2x})^{\frac{3}{2} } (4e^{x})-(4e^{x})(\frac{3}{2}(1+e^{2x})^{\frac{1}{2}})(32e^{2x}) =0](https://tex.z-dn.net/?f=%281%2B16e%5E%7B2x%7D%29%5E%7B%5Cfrac%7B3%7D%7B2%7D%20%7D%20%284e%5E%7Bx%7D%29-%284e%5E%7Bx%7D%29%28%5Cfrac%7B3%7D%7B2%7D%281%2Be%5E%7B2x%7D%29%5E%7B%5Cfrac%7B1%7D%7B2%7D%7D%29%2832e%5E%7B2x%7D%29%20%3D0)
![\Rightarrow (1+16e^{2x})^{\frac{3}{2}}-(\frac{3}{2}(1+e^{2x})^{\frac{1}{2}})(32e^{2x})](https://tex.z-dn.net/?f=%5CRightarrow%20%281%2B16e%5E%7B2x%7D%29%5E%7B%5Cfrac%7B3%7D%7B2%7D%7D-%28%5Cfrac%7B3%7D%7B2%7D%281%2Be%5E%7B2x%7D%29%5E%7B%5Cfrac%7B1%7D%7B2%7D%7D%29%2832e%5E%7B2x%7D%29)
![\Rightarrow (1+16e^{2x})^{\frac{3}{2}}=(\frac{3}{2}(1+e^{2x})^{\frac{1}{2}})(32e^{2x})](https://tex.z-dn.net/?f=%5CRightarrow%20%281%2B16e%5E%7B2x%7D%29%5E%7B%5Cfrac%7B3%7D%7B2%7D%7D%3D%28%5Cfrac%7B3%7D%7B2%7D%281%2Be%5E%7B2x%7D%29%5E%7B%5Cfrac%7B1%7D%7B2%7D%7D%29%2832e%5E%7B2x%7D%29)
![\Rightarrow (1+16e^{2x})^{\frac{1}{2}}=48e^{2x}](https://tex.z-dn.net/?f=%5CRightarrow%20%281%2B16e%5E%7B2x%7D%29%5E%7B%5Cfrac%7B1%7D%7B2%7D%7D%3D48e%5E%7B2x%7D)
![\Rightarrow (1+16e^{2x})}=48^2e^{2x}=2304e^{2x}](https://tex.z-dn.net/?f=%5CRightarrow%20%281%2B16e%5E%7B2x%7D%29%7D%3D48%5E2e%5E%7B2x%7D%3D2304e%5E%7B2x%7D)
![\Rightarrow 2304e^{2x}-16e^{2x}-1=0](https://tex.z-dn.net/?f=%5CRightarrow%202304e%5E%7B2x%7D-16e%5E%7B2x%7D-1%3D0)
Solving this eq,
we get ![x= \frac{1}{2304e^4-16e^2}](https://tex.z-dn.net/?f=x%3D%20%5Cfrac%7B1%7D%7B2304e%5E4-16e%5E2%7D)
∴ At
the curvature is maximum.
What is the rest of the expression?
Answer:
C
Step-by-step explanation:
Credit Score is a numerical expression which analyzes a person's credit level by looking at this financial conditions. Will he/she be worthy of loan or not.
payment history comprises 35% of a person's credit score. This is a huge factor. If you consistently make your payments on time, your credit score increases.
length of credit history tells how secure you will be to lenders. Usually 7 years+ is a great length of credit history. This pretty much affects credit score.
marital status doesn't affect credit score. Lenders assess a person based on their financial condition and past activity, NOT whether or not he/she is married or not. That's personal agenda.
debt ratio is the ratio of total debt to total assets. If this is high, it means a person owes money to banks/individuals and is more likely to be not given credit. It affects credit score highly.
THus, the correct answer is C