so i did these questions are they right ? the working and all ??
Find the dervative
dθ/dr= d/dr (3r+2)(2r+3)-(3r+2)d/dr(2r+3)/ (2r+3)^2
dθ/dr= 6r +9-6r-4/ (2r+3)^2
Find the derivative
y= x^2 +2x -3
y= x^2 +2xΔx+(Δx)^2+2x+2Δx-3-x^2-2x+3
=2x+2 or 2(x+1)