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JeroMii
07.05.2021 •
Mathematics
Which of the following is equivalent to x/x^2-1 + 4/x^2-6x-7?
a. x(x-7)+4(x-1)/(x+1)^2(x-7)
b. x+4/(x+1)^2(x-7)
c. x(x-7)+4(x-1)/(x+1)(x-1)(x-7)
d. x+4/(x+1)(x-1)(x-7)
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Ответ:
201.06 = (1/3)*pi*r^2*12
r = sqrt ( 201.06 / [(1/3)*pi*12]
= 4 units to nearest whole number.