# Answer key for math problems

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We should consider a fundamental question: what is the purpose of solving these two kinds of equations and obtaining the explicit relationship between input and output? If the results obtained by painstaking efforts can not well understand the system behavior and explain the system characteristics, it is necessary to explore new methods. Fourier transform and Laplace transform are powerful tools for studying continuous time systems described by linear constant coefficient differential equations, while Z-transform is powerful tools for studying discrete time systems described by linear constant coefficient difference equations. The three transformations provide a new method for solving equations, and a new perspective for understanding system behavior and explaining system characteristics. So, what should the so-called time domain analysis of the system introduce and what should be mastered? This should be considered in the context of the course signals and systems..

Perform all algebraic or geometric operations you can think of in detail. Use formal reasoning or intuitive insight, or, if possible, use both methods to determine the correctness of each step. If your topic is very complex, you can distinguish between big steps and small steps, and each big step contains several small steps. Check the big steps first, and then go deep into some small steps in turn.

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The area of the rectangular area formed by the Yellow L-shape and the green L-shape that originally changed is equal again. The two (triangles) that were originally thought to be chord concave and chord convex are congruent in area. Because there are no more tools that can be measured in detail, we take an approximate value: 5 for green shares and 8 for red shares. To calculate the area change due to the position change of the blue and red triangles in the (large triangle).

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Super helpful. There are some apps which just simply give you an answer. if you're really trying to figure out how to get the answer, that's no good. This one you have to pay for the extra stuff, but it does give you step by step problem solving, WHY you do certain things and chat with someone if you still don't understand it. All in all, I think this is a great app. The only thing it's not really up to date on are word problems, at least I haven't figured out to make them work.

Vienna Cooper

Really helpful. Sometimes it gives me a correct answer but not the one I was looking for. Still really, really helpful when checking my work. This app was amazing. It was very helpful even I try to solve the questions of mathematics this app helps me very well.

Umeko Hayes