A 50-m bridge over a crevasse is supported by a parabolic arch. The function defined by f ( x ) = − 0.16 ( x − 25 ) 2 + 100 (where 0 ≤ x ≤ 50 ) approximates the height f ( x ) (in feet) of thesupporting arch x meters from the end of the bridge (see figure). a. What is the location of the vertex of the arch? b. What is the maximum height of the arch (relative to theorigin)?
A 50-m bridge over a crevasse is supported by a parabolic arch. The function defined by f ( x ) = − 0.16 ( x − 25 ) 2 + 100 (where 0 ≤ x ≤ 50 ) approximates the height f ( x ) (in feet) of thesupporting arch x meters from the end of the bridge (see figure). a. What is the location of the vertex of the arch? b. What is the maximum height of the arch (relative to theorigin)?
Solution Summary: The author explains how to calculate the vertex of the arch, which is supported by a parabolic arch.
A 50-m bridge over a crevasse is supported by a parabolic arch. The function defined by
f
(
x
)
=
−
0.16
(
x
−
25
)
2
+
100
(where
0
≤
x
≤
50
) approximates the height
f
(
x
)
(in feet) of thesupporting arch x meters from the end of the bridge (see figure).
a. What is the location of the vertex of the arch?
b. What is the maximum height of the arch (relative to theorigin)?
Q1lal Let X be an arbitrary infinite set and let r the family of all subsets
F of X which do not contain a particular point x, EX and the
complements F of all finite subsets F of X show that (X.r) is a topology.
bl The nbhd system N(x) at x in a topological space X has the following
properties
NO- N(x) for any xX
N1- If N EN(x) then x€N
N2- If NEN(x), NCM then MeN(x)
N3- If NEN(x), MEN(x) then NOMEN(x)
N4- If N = N(x) then 3M = N(x) such that MCN then MeN(y) for any
уем
Show that there exist a unique topology τ on X.
Q2\a\let (X,r) be the topology space and BST show that ẞ is base for a
topology on X iff for any G open set xEG then there exist A Eẞ such
that x E ACG.
b\Let ẞ is a collection of open sets in X show that is base for a
topology on X iff for each xex the collection B, (BEB\xEB) is is a
nbhd base at x.
-
Q31 Choose only two:
al Let A be a subspace of a space X show that FCA is closed iff
F KOA, K is closed set in X.
الرياضيات
b\ Let X and Y be two topological space and f:X -…
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