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The number of values of c such that the straight line y = 4x + c touches the curve x^2/4 +y^2 = 1 is

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The number of values of c such that the straight line y = 4x + c touches the curve  x2/4 +y2 = 1 is

(A) 0 

(B) 2 

(C) 1 

(D) ∞

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1 Answer

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Best answer

Correct option (B) 2   

Explanation:

For ellipse, condition of tangency is c2 = a2 m + b

So, number of values are 2.

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