Question
Let f(x)=4x^2-3x and g(x)=x^2-x+3 Find (f+g)(x),(f-g)(x),(fg)(x) and ((f)/(g))(x) Give the domain of each. (f+g)(x)= square (Simplify your answer.)
Solution
4.7
(282 Votos)
Julia
Elite · Tutor por 8 anos
Resposta
To find
, we need to add the functions
and
together.
Substituting the given functions, we have:
Combining like terms, we get:
Therefore,
.The domain of
is all real numbers, since there are no restrictions on the values of
for which the expression is defined.
(Simplify your answer.)To find
, we need to subtract the function
from the function
.
Substituting the given functions, we have:
Combining like terms, we get:
Therefore,
.The domain of
is all real numbers, since there are no restrictions on the values of
for which the expression is defined.
(Simplify your answer.)To find
, we need to multiply the functions
and
together.
Substituting the given functions, we have:
Expanding the expression, we get:
Combining like terms, we get:
Therefore,
.The domain of
is all real numbers, since there are no restrictions on the values of
for which the expression is defined.
(Simplify your answer.)To find
, we need to divide the function
by the function
.
Substituting the given functions, we have:
Therefore,
.The domain of
is all real numbers except for the values of
that make the denominator equal to zero. In this case, the denominator is
, which is never equal to zero for any real number
. Therefore, the domain of
is all real numbers.