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yungkxng57
08.12.2019 •
Social Studies
Transitional fossils are fossils of organisms that have characteristics of their ancestors' species and their descendants' species. why do you think these fossils are important to the study of evolution? do you think the word transitional is a scientifically appropriate description for these fossils? knowing how fossils form, do you think it's likely that humans will ever piece together a complete fossil record for every species that ever existed on earth? why or why not?
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Ответ:
a) the area of a square is A = L^2= 16x^2 - 8x+1= (4x -1)^2, so sqrt (L^2)= sqrt (4x -1)^2, and so L = 4x - 1,
b) the area of a rectangle is A = h x w = 81x^2-4y^2 = (9x- 2y) (9x + 2y)
so w = (9x- 2y) and h=(9x + 2y)
c) let be f(x) = x^3-9x^2-4x+36, so f(2) = 8-36-8+36=0, f(x) can be written as
f(x) = (x - 2) (ax^2 + bx +c), we must find a, b and c
(ax^2 + bx +c)=x^3-9x^2-4x+36 / x - 2, after the division we have
ax^2 + bx +c = x^2-7x-18, and x= - 2 is a zero of x^2-7x-18, so x^2-7x-18 = (x +2) (ax + b), ax + b =x^2-7x-18 / x + 2 = x - 9
finally V = h x w x L =(x - 2) (x +2) (x - 9),