a.

t' = t + (λR)/(4√(2tR - t²))

b.

t' = t - (λR)/(2√(2tR - t²))

c.

t' = t + (λR)/(2√(2tR + t²))

d.

t' = t + (λR)/(2√(2tR - t²))

e.

t' = t - (λR)/(2√(2tR + t²))

Answer:

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