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## Homework Statement

Verify that each given function is a solution of the differential equation.

1. ty' - y = t^2 ; y = 3t + t^2

2. y'' + y = sect , 0<t<pi/2 ; y = (cost)ln( cost ) + tsint

## The Attempt at a Solution

int (tdy) = int(t^2 + y)dt

which isn't y=3t + t^2

For the second part I'm not sure where to go. Thanks for the help guys.