f'(x)= 4/2√(x-1) +3 = 2/√(x-1) +3
2/√(x-1) +3 = 5
2/√(x-1) = 5-3
2/√(x-1) = 2
2 = 2* √(x-1)
1=√(x-1)
x-1=1
x=2
f'(x)= 4/2√(x-1) +3 = 2/√(x-1) +3
2/√(x-1) +3 = 5
2/√(x-1) = 5-3
2/√(x-1) = 2
2 = 2* √(x-1)
1=√(x-1)
x-1=1
x=2