(a) Sketch a graph of g x = 2 x 2 − 5 x − 5 in a rectangular coordinate system . (b) Find x and y intercepts algebraically to four decimal places (c) Graph g x = 2 x 2 − 5 x − 5 in a standard viewing window (d) Find the x and y intercepts to four decimal places using TRACE and the ZERO command on your graphing calculator.
(a) Sketch a graph of g x = 2 x 2 − 5 x − 5 in a rectangular coordinate system . (b) Find x and y intercepts algebraically to four decimal places (c) Graph g x = 2 x 2 − 5 x − 5 in a standard viewing window (d) Find the x and y intercepts to four decimal places using TRACE and the ZERO command on your graphing calculator.
Solution Summary: The author explains how to graph the function g(x)=2, in a rectangular coordinate system.
(a) Sketch a graph of
g
x
=
2
x
2
−
5
x
−
5
in a rectangular coordinate system.
(b) Find
x
and
y
intercepts algebraically to four decimal places
(c) Graph
g
x
=
2
x
2
−
5
x
−
5
in a standard viewing window
(d) Find the
x
and
y
intercepts to four decimal places using TRACE and the ZERO command on your graphing calculator.
Formula Formula A polynomial with degree 2 is called a quadratic polynomial. A quadratic equation can be simplified to the standard form: ax² + bx + c = 0 Where, a ≠ 0. A, b, c are coefficients. c is also called "constant". 'x' is the unknown quantity
EXAMPLE 3
Find
S
X
√√2-2x2
dx.
SOLUTION Let u = 2 - 2x². Then du =
Χ
dx =
2- 2x²
=
信
du
dx, so x dx =
du and
u-1/2 du
(2√u) + C
+ C (in terms of x).
Let g(z) =
z-i
z+i'
(a) Evaluate g(i) and g(1).
(b) Evaluate the limits
lim g(z), and lim g(z).
2-12
(c) Find the image of the real axis under g.
(d) Find the image of the upper half plane {z: Iz > 0} under the function g.
k
(i) Evaluate
k=7
k=0
[Hint: geometric series + De Moivre]
(ii) Find an upper bound for the expression
1
+2x+2
where z lies on the circle || z|| = R with R > 10. [Hint: Use Cauchy-Schwarz]
Chapter 2 Solutions
Pearson eText for Finite Mathematics for Business, Economics, Life Sciences, and Social Sciences -- Instant Access (Pearson+)
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