Question

y=1/√2x
Differentiate the following if x=2
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Answer 1

y=1/√2x

y= 1/√2*2

y= √2/(√2)^2*2

y= √2/2*2

y= √2/4

Answer 2

y = 1/√2*2

y = 2/√4

y = 2/2√2

y = 2√2

make me brainlist plz...