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Advanced Math
·
Equivalent expressions
hard
f
(
x
)
=
x
+
3
g
(
x
)
=
7
x
2
−
r
x
+
63
The functions
f
and
g
are given. In function
g
,
r
is a constant. If
f
(
x
)
⋅
g
(
x
)
=
7
x
3
+
189
, what is the value of
r
?
1
21
\(f(x)=x+3\) \(g(x)=7x^2-rx+63\) The functions \(f\) and \(g\) are gi… | Math SAT Question | Ronan SAT