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If f(x) = ( a + x / b + x )x + cos x, find f'(0).
Please solve it as soon as possible.

Arjya Dutta , 7 Years ago
Grade 11
anser 1 Answers
Aditya Gupta
Answer should be ln(a/b) because cos differentiation is sinx which is zero at x=0.
Also, to differentiate the first part, take it equal to y then take log both sides and then differentiate using chain rule and put x=0 :)
Last Activity: 7 Years ago
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