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sevindjdna
04.02.2020 •
Mathematics
Coupon rate 12% coupons per year 2 years to maturity 15 price $1,153.72 face value $1,000.0 tax rate 40% how do you calculate the market interest rate
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Ответ:
Option 3
Step-by-step explanation:
log4(x) + log4(x - 3) = log4(-7x + 21)
log4(x² - 3x) = log4(-7x + 21)
x² - 3x = -7x + 21
x² + 4x - 21 = 0
x² + 7x - 3x - 21 = 0
x(x + 7) - 3(x + 7) =0
(x + 7)(x - 3) = 0
x = -7, 3
-7 and 3, both are e extraneous solutions because logs of non-positive numbers don't exist
At x = 3,
-7x + 21 = 0