sqrt (7/8) = sqrt(7)/sqrt(8) = sqrt(7)/ (sqrt(4*2)
sqrt(7)/(2sqrt(2))
no sqrt in the denominator
sqrt(7) * sqrt(2) sqrt (14) sqrt(14)
------------------- = ----------- =-------
2 sqrt(2) *sqrt(2) 2 (2) 4
Answer: sqrt(14)/4
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