CHAPTER 4 Gradient, Divergence, Curl ANSWERS TO SUPPLEMENTARY PROBLEMS 4.42. 10i-4j-16k, 2√93 4.43. 5, 7i-j-11k 4.44. (a) -4i +9i+k (h) 0: 2 9. IF À = 3 xy²² 2 + 2xy j - x³y²k & p = 3x² - y² FIND A) 7. À @ (1,-1,1) DA ax aà dx + OA oy J + JA dz 3^ 3yz ²³2 + 2y³j - 2xyz k 4.64. In the direction of 4i - 6j + 2k, 2√//14 4.65. a = 6, b= 24, c = -8 95 preted at the poin

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