Question

If y = ln7x, then y’ is
Select one:
A. -7/x
B. 1/7x
C. 7/x
D. 1/x

Answer 1

$y' = (ln 7x)' = 1/7x *(7x)' = 1/7x * 7 =$

$= 7/7x = 1/x$

Answer : D $1/x$