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Class : Class 10
You cannot divide any number having it's denominator as 0. That is so because, 0 * anything = 0. So, when you have a number like 5/0, you don't have an answer because 0*5 = 0, etc. Also, 0/0 is also undetermined. Because 0 * Any number = 0. Therefore 0*2=0; 0*3=0, etc. Therefore you cannot have a definite answer. As for 0^0, it is equal to 1. You can check in calculator. Any number raised to the power 0 = 1. Hope this helps.
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Class : Class 9
This quadratic equation don't has real roots. The roots are imaginary which are given below:
[-1+(-7)^1/2]/2
and
[-1-(-7)^1/2]/2
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Class : Class 9
Arithmetic progression (AP) is a type of series where there is a common difference between the subsequent numbers in the series.