Assignment 14 Solve the following DEs using the variation of parameters method 1. y" +4y' +5y= 2e* 2. y" +4y'+3y=x-1 3. y" - y = 2e²* + ex 2x 4. y" y cosx+3sinx 5. (D21)y ex sin x 6. y" +2y' + y cos² x 7. y" 5y'+6y= cosh x 8. (D2+4D+4)y = xe¯*

The state of stress at a point in a member is shown on the rectangular stress element in (Figure 5) where the magnitudes of the stresses are σx 10 ksi, |oy| = 29 ksi, and | Txy| = 6 ksi. - Determine the state of stress on an element rotated 40° counterclockwise from the element shown. Express your answers, separated by commas, to three significant figures. View Available Hint(s) ΕΠΙ Η ΜΕ ΑΣΦ vec σ =0y=, Try = 23.76, 15.24,7.56 Submit Previous Answers × Incorrect; Try Again; 5 attempts remaining ? ksi, ksi, ksi

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af 11. Iff= show that y √(1-2xy + y²) (x-y) ax af