In Exercises 6–7, find the indicated function values for each function. If necessary, round to two decimal places. If the function value is not a real number and does not exist, so state. f ( x ) = 2 x − 5 ; f ( 15 ) , f ( 4 ) , f ( 5 2 ) , f ( 1 )
In Exercises 6–7, find the indicated function values for each function. If necessary, round to two decimal places. If the function value is not a real number and does not exist, so state. f ( x ) = 2 x − 5 ; f ( 15 ) , f ( 4 ) , f ( 5 2 ) , f ( 1 )
Solution Summary: The author explains that f(x)=sqrt2x-5 is not a real number.
In Exercises 6–7, find the indicated function values for each function. If necessary, round to two decimal places. If the function value is not a real number and does not exist, so state.
f
(
x
)
=
2
x
−
5
;
f
(
15
)
,
f
(
4
)
,
f
(
5
2
)
,
f
(
1
)
Find the values of n, if the points (n + 1, 2n), (3n, 2n + 3) and (5n + 1,5n) are collinear.
Find the value of k that the four points (4,1,2), (5, k, 6), (5,1,-1) and (7,4,0) are coplanar.
Find the value of r if the area of the triangle is formed by the points (-3,6),(4,4) and (r,-2) is
12 sq units.
Find the volume of tetrahedron whose vertices are A(1,1,0), B(-4,3,6), C(-1,0,3) and
D(2,4,-5).
- Consider the following system of linear equations in the variables a,b,c,d:
5a-3b 7c - 2d = 2
2ab
2c+ 5d = -3
→ (*)
4a 3b 5d = 3
6a b+2c+ 7d = −7
(a) Solve the system (*) by using Gauss elimination method.
(b) Solve the system (*) by using Cramer's rule method.
Solve for a 25 55 30 a=?
Chapter 7 Solutions
Intermediate Algebra for College Students (7th Edition)
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