( x2/3 − x1/3 + 1x + 1 − x − x1/2x − 1 )10 = ( x2/3 − x1/3 + 1(x1/3)3 + 13 − x − x1/2(x)2 − 12 )10 ( x2/3 − x1/3 + 1(x1/3 + 1)(x2/3 − x1/3 + 1) − x(x − 1)(x + 1)(x − 1) )10 = ( ( x1/3 + 1 ) − x ( x + 1 ) )10 = ( ( x1/3 + 1 ) − ( 1 + x 1 ) )10 = ( x1/3 − x1/21 )10
[Note: For ( xα ± xβ 1 )n the ( r + 1 )th term with power m of x is r = α + β nα − m ]
Here α = 31 , β = 21 and m = 0 then r = 31 + 21 10 × 31 − 0 = 310 × 56 = 4 ∴ T5 is the term independent of x.
∴ T5 = 10C4 = 210