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Author Question: Find if z = x sin y, where x = t2 + 2t + 1 and y = ln t. (Read 19 times)

dalyningkenk

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Question 1

For what value(s) of the constant  k  is the function  f(x, y, z) = e-(3x + 4y)sin(kz)  a harmonic function in 3-space?  Note that a harmonic function f in 3-space satisfies + + = 0.
◦ k = 7
◦ k = 0
◦ k = ± 5
◦ k = ± 1
◦ k = ±4

Question 2

Find  if  z = x sin y, where x = t2 + 2t + 1  and y = ln t.
= 2(t + 1) sin(ln t) + cos(ln t)
= 2(t + 1) cos(ln t) + sin(ln t)
= 2(t + 1) sin(ln t) + cos(ln t)
= 2(t + 1) sin(t) + cos(t)
= 2(t + 1) sin(ln t) - sin(ln t)


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Marked as best answer by dalyningkenk on May 27, 2021

miss_1456@hotmail.com

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Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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dalyningkenk

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Reply 2 on: May 27, 2021
:D TYSM


peter

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

 

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