A) \[20x-y=15\]
B) \[x+20y=101\]
C) \[20x+y=15\]
D) \[x-20y=101\]
Correct Answer: A
Solution :
Given curve is \[y=5{{x}^{4}}\] \[\therefore \] \[\frac{dy}{dx}=20{{x}^{3}}\] At \[(1,\,5),\frac{dy}{dx}=20\] Now, equation of tangent at \[(1,5)\] is \[y-5=20(x-1)\] \[\Rightarrow \] \[20x-y-15=0\] or \[20x-y=15\]You need to login to perform this action.
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