Evaluate the integral:

24/x^2sqrt(x2+49)dx

(A) Which trig substitution is correct for this integral?

(B) Which integral do you obtain after substituting for

xand simplifying?

________d

(C) What is the value of the above integral in terms of

?

_________+ C

(D) What is the value of the original integral in terms of

x?

__________+ C