A) \[4x-y+4=0\]
B) \[4x+y+4=0\]
C) \[x+4y-4=0\]
D) None of these
Correct Answer: A
Solution :
The ordinate of a point on the parabola \[{{y}^{2}}=64x\] is\[y=8,\] then \[{{(8)}^{2}}=64x\Rightarrow x=1\] Hence, equation of tangent line at point (1, 8) is \[y{{y}_{1}}=2a(x+{{x}_{1}})\] \[\Rightarrow \] \[y(8)=2.16(x+1)\] \[\Rightarrow \] \[y=4(x+1)\] \[\Rightarrow \] \[4x-y+4=0\]You need to login to perform this action.
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