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secondary 3 | A Maths
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I find that it is impossible to differenciate part c. I got T= 2x+400 as an answer, and when differenciated means dt/dx=2 (since x powe 1 minus 1 is 0, meaning the x is gone)
Date Posted: 3 years ago
Views: 502
Pythagoras Theorem :
CD² = AC² + AD²
CD² = 20² + x²
CD = √(400+x²)
T = 5 CD + 3 DB
T = 5√(400+x²) + 3(100 - x)
T = 5√(400+x²) + 300 - 3x
You should be diffentiating this.
CD² = AC² + AD²
CD² = 20² + x²
CD = √(400+x²)
T = 5 CD + 3 DB
T = 5√(400+x²) + 3(100 - x)
T = 5√(400+x²) + 300 - 3x
You should be diffentiating this.
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done
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Hope it helps
Date Posted:
3 years ago
Yup i understand it! Thanks alot!
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