A) \[x-y+1=0\]
B) \[x-y+7=0\]
C) \[x-y+9=20\]
D) \[x-y-3=0\]
Correct Answer: A
Solution :
Hyperbola is \[\frac{{{x}^{2}}}{5}-\frac{{{y}^{2}}}{4}=1\] |
Equation of its tangent in slope from is \[y=mx\pm \sqrt{5{{m}^{2}}-4}\] |
Hence, tangent with slope 1 is \[y=x\pm 1.\] |
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