Determine intervals where solutions are sure to exist 1) y^(4)+4y'''+3y=t
2) t(t -1)y^(4) + e^ty'' + 4t^2y = 0
3) (x-1)y^(4)+(x+1)y''+(tanx)y=0

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How do i do this activity, is appreciated

Which of the following is not a solution to the inequality graphed below? (-2, -4)(-1, -5)(0, -3)(2, -1)which of the following is a solution to the inequality graphed below? select all that apply.(-3, -3)(-1, -1)(-3, -1)(2, 2)