The answer is "John Maynard Keynes's theory".
Keynesian financial aspects created amid and after the Great Depression, from the thoughts displayed by John Maynard Keynes in his 1936 book, The General Theory of Employment, Interest and Money. Keynesian business analysts for the most part contend that, as total request is unpredictable and shaky, a market economy will regularly encounter wasteful macroeconomic results as monetary retreats and and inflation.
With the removal of Indians from American territory, the white nation became stronger. Jackson was the first democratically elected president. He fought for the "common man" and against banks.
<h3><u>Was the Jacksonian era a democratic era?</u></h3>
Even though Andrew Jackson was only president from 1829 to 1837, his impact on American politics was felt both before and after his presidency. The period from approximately 1824 to 1840 has been referred to as the "Age of Jacksonian Democracy" and the "Era of the Common Man."
However, by modern standards, the United States was far from democratic. Women could not vote and were legally under the control of their husbands; free blacks were considered second-class citizens at best, if not completely disenfranchised; and slavery was expanding in the southern states.
Furthermore, the period saw the relocation of Native Americans west of the Mississippi River, as well as the concentration of wealth in fewer and fewer hands. However, changes occurred that broadened political participation and reform movements emerged to address inequalities in American society.
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a. Let's set a=3, b=1
In other words 
is odd, i.e. has remainder 1 when divided by 2. 
b. Let
There are 2n terms in the last factor. All the terms of the form
are odd. So when we add up an even number of them, we get an even number, call it 2m.
We've shown 
is divisible by four. 
Merry Christmas!
That is called a speedometer
