X^3=1/8
x=(1/8)^(1/3)
x=1/2
Answer:
Option D is correct.
Step-by-step explanation:
We are given
We know that![\sqrt[5]{x} = x^\frac{1}{5}](https://tex.z-dn.net/?f=%5Csqrt%5B5%5D%7Bx%7D%20%3D%20x%5E%5Cfrac%7B1%7D%7B5%7D)
and we are given:
![\sqrt[5]{x^7}\\ We\,\, can\,\, write\,\, as\,\,\\x^\frac{7}{5}](https://tex.z-dn.net/?f=%5Csqrt%5B5%5D%7Bx%5E7%7D%5C%5C%20We%5C%2C%5C%2C%20can%5C%2C%5C%2C%20write%5C%2C%5C%2C%20as%5C%2C%5C%2C%5C%5Cx%5E%5Cfrac%7B7%7D%7B5%7D)
So, Option D is correct.
<u>Answer-</u>
The total interest after 3 years is Rs.5760 .
<u>Solution-</u>
Total money borrowed = Rs.12000
Out of those Rs.4000 is of 18% interest rate and remaining 12000-4000=8000 is of 15% interest rate.

Where,
P₁ = principal amount = Rs.4000
P₂ = principal amount = Rs.8000
r₁ = rate of interest of P₁ = 18%
r₂ = rate of interest of P₂ = 15%
t = time period = 3 years
