作业帮log2(√2-1)-log2((√2+1)=log2(x^2)求x+(1/x)的值(PS,log后的2是底数,括号里的都是N,希望有过程.
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log2(√2-1)-log2((√2+1)=log2(x^2)求x+(1/x)的值(PS,log后的2是底数,括号里的都是N,希望有过程.
log2(√2-1)-log2((√2+1)=log2(x^2)
求x+(1/x)的值
(PS,log后的2是底数,括号里的都是N,希望有过程.
log2(√2-1)-log2((√2+1)=log2(x^2)求x+(1/x)的值(PS,log后的2是底数,括号里的都是N,希望有过程.
要使log2(√2-1)-log2((√2+1)=log2(x^2) 有意义,X^2>0,即X>0,
log2(√2-1)-log2((√2+1)=log2(x^2)
log2[(√2-1)/(√2+1)]=log2(x^2)
(√2-1)/(√2+1)=x^2,
x^2=(√2-1)^2,(x>0)
x=(√2-1),
x+(1/x))的值=(√2-1)+1/(√2-1)=2√2.
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