# How to solve the differential-integral equation?

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#phi'(t)=1/2int_0^t(t-sigma)^2phi(sigma)dsigma=-t# #phi(0)=1#

##### 1 Answer

Jun 28, 2018

#### Explanation:

#{(phi'(t)=-t qquad triangle),(phi'(t) = 1/2 int_0^t(t-sigma)^2phi(sigma)dsigma qquad square):}#