Chapter 7.2, Problem 53E

9. y" - у' — 2у %3D - 2t + 4? I| 10. (D? — 6D + 9) у %3D езх

In Exercises 13-14, find ||proj₁u||. 13. (a) u = (1, −2), a = (−4, −3) (b) u = (3, 0, 4), a = (2, 3, 3)

af Find and ду ху +1 f(x, y) = x + y

Hint: What can you say about (?^2) + ??

Evaluate H(u) = (u-Vu)(u + vũ)

2x+7 Evaluate / dx. (x-1)²(x+1) Select the correct answer below: In- +C ɔ+4 - |1 + *| u O 를 마2-11- 을 +C 국lInx-1| + 풍In [x + 1| - 을급+C 푸미x + 1| - 21미x - 1| -을 +C

Calculate û x ô if û = } + 2k and û = -i - ĵ + k.

Use miscellanous substitution

CZ b+२१-_९६-९८