The Student Room Group
Reply 1
(1 + 5*0.04) / sqrt(1 + 2*0.04)
= 1.2/sqrt(1.08)
= 1.2/sqrt(3*0.36)
= 1.2/(0.6sqrt(3))
= 2/sqrt(3)

Now use the expansion.
Reply 2
Jonny W
(1 + 5*0.04) / sqrt(1 + 2*0.04)
= 1.2/sqrt(1.08)
= 1.2/sqrt(3*0.36)
= 1.2/(0.6sqrt(3))
= 2/sqrt(3)

Now use the expansion.


thanks - that was really clever

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