Question

现在的小学生数学题怎么这么难啊？帮帮忙吧！

Answer 1

1)

x的不等式2a(-1)^(4b+1)*2^(4b+1) + 5*2^[3*(3b-10)]=3*2^(4*b)

->-2^(4b)*2+5*2^(4b)*2^(4b)*2^(b-30)=3*2^(4b)

->-2+5*2^(5b-30)=3

->5*2^(5b-30)=5

->2^(5b-30)=1

->5b-30=0

->b=6

->k=4

2) k=4, y=6

n+k-4