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Mathematics
Mathematics
Problem
The equation of a curve passing through
(
2
,
7
/
2
)
(2, 7/2)
(
2
,
7/2
)
and having gradient
1
−
1
x
2
1 - \frac{1}{x^2}
1
−
x
2
1
at
(
x
,
y
)
(x, y)
(
x
,
y
)
is (a)
y
=
x
2
+
x
+
1
y = x^2 + x + 1
y
=
x
2
+
x
+
1
(b)
x
y
=
x
2
+
x
+
1
xy = x^2 + x + 1
x
y
=
x
2
+
x
+
1
(c)
x
y
=
x
+
1
xy = x + 1
x
y
=
x
+
1
(d) none of these
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