Given function: We are given the function f(w)=w2+5cos(w) and we need to find its derivative with respect to w, which is denoted as dwd(w2+5cos(w)).
Sum rule application: To find the derivative of the function, we will apply the sum rule of differentiation, which states that the derivative of a sum of functions is the sum of their derivatives. We will also use the power rule for the w2 term and the chain rule for the 5cos(w) term.
Derivative of w2: First, let's find the derivative of the first term, w2. Using the power rule, which states that the derivative of wn is n∗w(n−1), we get:(d/dw)(w2)=2w
Derivative of 5cos(w): Now, let's find the derivative of the second term, 5cos(w). The derivative of cos(w) with respect to w is −sin(w), and since we have a constant multiple of 5, we use the constant multiple rule to get:(dwd)(5cos(w))=5×(dwd)(cos(w))=5×(−sin(w))=−5sin(w)
Combining derivatives: Combining the derivatives of both terms, we get the derivative of the entire function: (dwd)(w2+5cos(w))=(dwd)(w2)+(dwd)(5cos(w))=2w−5sin(w)
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