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X – intercept of the line ax + by + c = 0 is A) \(\cfrac{-c}a\)B) \(\cfrac{c}a\)C) \(\cfrac{a}c\)D) \(\cfrac{1}c\) |
Answer» Correct option is (A) \(\frac{-c}{a}\) Given line is ax+by+c = 0 \(\Rightarrow ax+by=-c\) \(\Rightarrow\frac{ax}{-c}+\frac{by}{-c}=1\) \(\Rightarrow\frac{x}{\frac{-c}{a}}+\frac{y}{\frac{-c}{b}}=1\) By comparing with intercept form of line, we get X-intercept \(=\frac{-c}a\) and Y-intercept \(=\frac{-c}b\) Hence, X-intercept of the line ax+by+c = 0 is \(\frac{-c}{a}.\) Correct option is A) \(-\cfrac{c}a\) |
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