3^x+1*5^x+1=15^2x-3,求x的值
问题描述:
3^x+1*5^x+1=15^2x-3,求x的值
答
3^(x+1) * 5^(x+1)=15^(2x-3)
15^(x+1)=15^(2x-3)
x+1=2x-3
x=4