Solve :
(3x-2)4-(2x+3)3=23-x
Given :
=3(3x-2)-4(2x+3)12=2-3x3
=9x-6-8x-1212=2-3x3
⇒x-18=4(2-3x)
⇒x-18=8-12x
=x+12x=8+18
⇒x=2613
⇒x=2
Hence x=2 is the correct answer.
If f=x1+x2+13(x1+x2)3+15(x1+x2)5+... to ∞ and g=x−23x3+15x5+17x7−29x9+..., then f=d×g. Find 4d.