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Mathematics
Mathematics
Problem
Which of the following equals
d
d
x
(
x
2
−
3
cos
x
)
\dfrac{d}{dx}\bigl(x^{2}-3\cos x\bigr)
d
x
d
(
x
2
−
3
cos
x
)
? a)
2
x
−
3
sin
x
2x-3\sin x
2
x
−
3
sin
x
b)
2
x
+
3
sin
x
2x+3\sin x
2
x
+
3
sin
x
c)
x
−
3
sin
x
x-3\sin x
x
−
3
sin
x
d)
2
x
+
3
cos
x
2x+3\cos x
2
x
+
3
cos
x
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