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If x^2+ y^2 = R^2 (R> 0) then k = y''/√(1 + y'^2)^3 where k in terms of R alone is equal to

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in Limit, continuity and differentiability by (52.6k points)

If x2+ y2 = R2 (R> 0) then k = y''/√(1 + y'2)3 where k in terms of R alone is equal to

(A) - 1/R2

(B) - 1/R

(C) 2/R

(D) - 2/R2

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Answer is (B) - 1/R

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