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Mathematics
Mathematics
Problem
If
y
=
x
e
3
x
sec
x
y = x e^{3x}\sec x
y
=
x
e
3
x
sec
x
, then
y
′
y'
y
′
equals a)
e
3
x
sec
x
(
1
+
3
x
+
tan
x
)
e^{3x}\sec x\bigl(1 + 3x + \tan x\bigr)
e
3
x
sec
x
(
1
+
3
x
+
tan
x
)
b)
e
3
x
sec
x
(
1
+
3
x
+
x
tan
x
)
e^{3x}\sec x\bigl(1 + 3x + x\tan x\bigr)
e
3
x
sec
x
(
1
+
3
x
+
x
tan
x
)
c)
e
3
x
sec
x
(
1
+
3
x
−
x
tan
x
)
e^{3x}\sec x\bigl(1 + 3x - x\tan x\bigr)
e
3
x
sec
x
(
1
+
3
x
−
x
tan
x
)
d)
e
3
x
sec
x
(
1
+
3
x
+
x
sec
x
)
e^{3x}\sec x\bigl(1 + 3x + x\sec x\bigr)
e
3
x
sec
x
(
1
+
3
x
+
x
sec
x
)
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