Differentiate w.r.t. ϕ
1.96
Evaluate
\frac{49ϕ}{25}
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1.96ϕ^{1-1}
The derivative of ax^{n} is nax^{n-1}.
1.96ϕ^{0}
Subtract 1 from 1.
1.96\times 1
For any term t except 0, t^{0}=1.
1.96
For any term t, t\times 1=t and 1t=t.
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