数学,二项式定理

2025-06-20 21:22:02
推荐回答(1个)
回答1:

C40(x²)^0(-x)^4*1+C31(x²)^1(-x)^2*1²+C22(x²)²*1³
=1+3+1
=5
2.C10 8*x^8*2²*x^2+
C10 10*x^10*(-1)
=C10 8-C10 10
=44
3.C10 7*2^7(-3)^3
=120*128*(-27)
=-414720