ukm minh cung khong hieu!!

Vay ban lam ho minh cau nay nha!!

TIM CAC SỐ TỰ NHIÊN x SAO CHO:  2^x  +  3^x   =  5^x

x+500=10 000

x=10 000-500

x=500

tk mk mk tk lại

(^_^)

\(\left(\frac{a}{a-1}-\frac{1}{a^2-a}\right):\left(\frac{1}{a+1}+\frac{2}{a^2-1}\right)=\left(\frac{a}{a-1}-\frac{1}{a\left(a-1\right)}\right):\left(\frac{1}{a+1}+\frac{2}{\left(a-1\right)\left(a+1\right)}\right)\)

\(=\frac{a^2-1}{a\left(a-1\right)}:\frac{a-1+2}{\left(a-1\right)\left(a+1\right)}=\frac{\left(a^2-1\right)\left(a-1\right)\left(a+1\right)}{a\left(a-1\right)\left(a+1\right)}=\frac{a^2-1}{a}=a-\frac{1}{a}\)

x=500