Continuity and DifferentiabilityHard

Question

If y = , -1 < x < 1 , then (1 - x²) equals

Options

A.x + y

B.1 + xy

C.1 - xy

D.xy - 2

Solution

y =

( 1 - x²) = 1 +× x
(1 - x²) = 1 + xy

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