What is the arc length of f(x)=6x^(3/2)+1 f(x)=6x32+1 on x in [5,7]x∈[5,7]?
1 Answer
Mar 19, 2018
Explanation:
f(x)=6x^(3/2)+1f(x)=6x32+1
f'(x)=9sqrtx
Arc length is given by:
L=int_5^7sqrt(1+81x)dx
Integrate directly:
L=2/243[(1+81x)^(3/2)]_5^7
Hence
L=4/243(568sqrt142-203sqrt406)