Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$A_{n}+Bn-2A+3B$$

Evaluate

$Bn+A_{n}+3B-2A$

Differentiate w.r.t. A_n

$1$

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