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Hello everyone,,im recently setting up my new startup and have been posed with the decision of which payment gateway to choose.in my startup (www.uxmonkeys.com) we dont really need anything more than simple payment and, in the future, subscription sy...

Hello everyone,,I understand the general concept of integration by parts and can solve simple problems however this one has me tearing my hair out.Let f(x) be a function such that f’(x) = -(f(x)) Find the integral of x * f(x)...?