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junior college 1 | H2 Maths
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Chowder
Chowder

junior college 1 chevron_right H2 Maths

Urgent tomoro exam at 9am . Need to know how to integrate this cos its 10 marks

Date Posted: 1 year ago
Views: 98

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Tang Jiacheng
Tang Jiacheng's answer
93 answers (Tutor Details)
1st
hopefully i didnt make a careless mistake...
Chowder
Chowder
1 year ago
But wait cher how u make 1/xlnx be lnx when integrate. I thought 1/xlnx integrate bcome ln^2x^2 cos lnx multiply by ln x . Can u show me working pls for that part . And the Q states the ans need be in ln x ?
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Tang Jiacheng
Tang Jiacheng's answer
93 answers (Tutor Details)
If u can observe this it will be great. If not sub u=ln x. The Q asks u to show that the integrating factor is lnx, and then find the general solution (which does not have to be in terms of lnx of course).
Chowder
Chowder
1 year ago
Sorry but i still abit confuse help please means if i do one by one like 1/x (1/lnx)
Give me lnx (1/lnx)
This doesnt equate to 1/(ln^2x^2) ? But why ? I thought x term multiply together get x^2? Why only the ln is squared ?
Tang Jiacheng
Tang Jiacheng
1 year ago
how did u arrive at ur ans? For integration of a product, u cannot just do one by one and multiply them together...
Chowder
Chowder
1 year ago
Can help another Q pls