Answer:
NOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
Step-by-step explanation:
It depends on which author you need the book by.
I found one book named Calculus with Analytic Geometry online, however, I'm not sure whether that is the one you need - it is written by S. M. Yusuf.
I couldn't find any other PDFs online, sorry. Maybe you could copy somebody's book?
Since the equation we're looking for is parallel to another line, we can "steal" the second line's slope and use it in our equation.
Point-slope formula:
y - y1 = m(x - x1)
y - 2 = 2(x-(-1))
y - 2 = 2(x+1)
Solve for y to put into slope intercept form:
y - 2 = 2x + 2
y = 2x + 4
Given:
Principal = Rs. 1200
Rate of interest = 25%
To find:
The time in which the interest will became equal to the principal.
Solution:
We have,
If interest is equal to the principal, then
The formula for amount is:
Substituting 
in the above formula, we get
Taking log on both sides, we get
![[\because \log a^b=b\log a]](https://tex.z-dn.net/?f=%5B%5Cbecause%20%5Clog%20a%5Eb%3Db%5Clog%20a%5D)
Therefore, the interest will became equal to the principal in about 3.11 years.
