solve the differential equations subject to the given conditions.

dy/dx= 4x^1/2 y=21 of x=4

is this derivative?!

2 answers

**antidervative
dy=4x^.5 dx

y= 2/3 * 4 x^1.5 + C

21=8/3 * 4^3/2 + C
21=64/3+C solve for C, then you have it.