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☐ A
A. (ii)
B. (iv)
C. None of the other choices is correct
☐ E
D. (i)
E. (iii)
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Find differential of
y = x² cos2x
(i) dy=2x(cos2x-x sin 2x)dx
==
(ii) dy = x(cos 2x - 2x sin 2x)dx
==
(iii) dy = 2x(cos2x+xsin 2x)dx
(iv) dy = x(2 cos2x-x sin 2x)dx
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