Question

Please help me, I am not being able to know what it means, and why,

Answer 1

@ganeshie8 @eliassaab

Answer 2

The last line I cannot understand

Answer 3

Since the definite integral evaluates to some number eventually, we can treat it as a quadratic in \(t\)

Answer 4

Also the integral of a square of something can never be negative. That means the graph must not go below the x axis :