Question

find the middle term in the expansion of ( a/x+bx)12

Answer 1

Even middle term = n/2 +1 = 12/2 +1= 7th term t7 = t6+1 = ^12C6 (a/x) ^12-6 (bx) ^6 = 12×11×10×9×8×7×6! / 6!×6×5×4×3×2×1 (a/x) ^6 (ax) ^6 = 11×2×3 ×2 × a^6 /X^6 ×b^6x^6 =132 a^6 /x^6 × b^6x^6