external section formula
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I'm facing trouble in the external section formula in vectors.here it is
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- external section formula.I don't know which is correct.need the solution
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Re: external section formula
the second part of that external section formula.
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- external section formula.the second part is here.picture
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Re: external section formula
I don't know which is correct or why that would be correct.
- Phlembac Adib Hasan
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Re: external section formula
Both of the formulae are correct. $C$ is not on the same end of $\vec{AB}$ in both proofs. That's why the formula changes.
Actually, there is no special formula called external section formula. It's just the internal section formula with one of the ratios being negative.
Actually, there is no special formula called external section formula. It's just the internal section formula with one of the ratios being negative.
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Re: external section formula
How can a ratio be negative?Is it because of different direction?
- Phlembac Adib Hasan
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Re: external section formula
Yeah. Vector lengths are direction sensitive.
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Re: external section formula
Lets talk out of vectors.Supposing if a point C divides a line segment AB externally what would it mean?Will it mean C is closer to A or B?Why would it mean so?