When gcd(a, b) = 1, prove σ(ab) = σ(a)σ(b) and find σ(200) and σ(720).

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Q: /Reverse the order of integration, then evaluate the following integ -ex dydx + [* [L | dydx I :

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Q: Extra Problem Let f(z) be a function analytic at 0 and define g(z) = f(z?). Show that gan - (0) = 0 ...

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A: Given:  y≥2x-1y≤-12x-2 To sketch: Graph of given inequalities.

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Q: EXs- Apply the improved Euler's method to the ODE : ý= x+y hzo-2, Xozo, Yozo Sol:- ki = 0.2 (Xn +Yn)...

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Q: VP 25) de ta sin(p) dp p+1 dp (-2) --1760 de 16 dpl- dp-a anique solution defined on the interval

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