8,32 \quad \text { (b) } 12
Differentiate w.r.t. b
99,84
Evaluate
\frac{2496b}{25}
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\frac{\mathrm{d}}{\mathrm{d}b}(99,84b)
Multiply 8,32 and 12 to get 99,84.
99,84b^{1-1}
The derivative of ax^{n} is nax^{n-1}.
99,84b^{0}
Subtract 1 from 1.
99,84\times 1
For any term t except 0, t^{0}=1.
99,84
For any term t, t\times 1=t and 1t=t.
99,84b
Multiply 8,32 and 12 to get 99,84.
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