Toán Lớp 6: x mũ 15 = x mũ 2
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Toán Lớp 6: x mũ 15 = x mũ 2
Tìm thuộc n,biết
Comments ( 2 )
=>x^15-x^2=0
=>x^2 . x^13-x^2 . 1=0
=>x^2 . (x^13-1)=0
=>[(x^2=0),(x^13-1=0):}
=>[(x=0),(x^13=0+1):}
=>[(x=0),(x^13=1):}
=>[(x=0),(x=1):}
Vậy x\in{0;1}