Question

cho x+\(\frac{1}{x}\)=3 tinh 

a,  x  \(^4\)+\(\frac{1}{x^4}\)

b,  x\(^5\)+\(\frac{1}{x^5}\)

Answer 1

a,x⁴+1/x⁴=(x²)²+(1/x²)²=(x²+1/x²)²-2 , bình phương gt lên rồi tính x²+1/x²

b,x⁵+1/x⁵=x⁵+(1/x)⁵=(x²+1/x²)(x³+1/x³)-x²/x³-x³x²=(x²+1/x²)(x³+1/x³)-(x+1/x)..... tự làm tiếp

Answer 2

giai gium minh cai nha minh xin cac ban do

Answer 3

ban hoang phuc oi

lam not luon di ban