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Mathematics
Mathematics
Problem
The graph of function
f
f
f
contains the point
P
(
1
,
2
)
P(1, 2)
P
(
1
,
2
)
and
Q
(
s
,
r
)
Q(s, r)
Q
(
s
,
r
)
. The equation of the secant line through
P
P
P
and
Q
Q
Q
is
y
=
(
s
2
+
2
s
−
3
s
−
1
)
x
−
1
−
s
.
y = \left( \frac{s^2 + 2s - 3}{s - 1} \right) x - 1 - s.
y
=
(
s
−
1
s
2
+
2
s
−
3
)
x
−
1
−
s
.
The value of
f
′
(
1
)
f'(1)
f
′
(
1
)
is a. 2 b. 3 c. 4 d. non-existent
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