Differentiate w.r.t. n
90
Evaluate
90n
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90n^{1-1}
The derivative of ax^{n} is nax^{n-1}.
90n^{0}
Subtract 1 from 1.
90\times 1
For any term t except 0, t^{0}=1.
90
For any term t, t\times 1=t and 1t=t.
Examples
Quadratic equation
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y = 3x + 4
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Matrix
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Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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