The discussion focuses on finding the particular integral for differential equations involving the operator \(\text{D}^2 + 9\). The participants inquire about the application of this operator to functions such as \(Ae^x\) and \(B\cos(2x)\). The key takeaway is that the operator can be applied directly to these functions to derive their respective particular integrals, which are essential for solving second-order linear differential equations.
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What is [itex]\displaystyle \ \ \left(\text{D}^2+9\right)\left(Ae^x\right)\ ?[/itex]manal950 said:Hi
here is question with answer
please can help me from where we got
1 + 9
and
-2+9
help me please
