Question

determinati nr natural x care verif egalitatile:
4 la puterea x + 2+4 la puterea x+1+4 la puterea x=336

Answer 1

4^(x+2)+4^(x+1)+4^x=336
4^x(4^2+4^1+4^0)=2^4 *3*7
4^x(16+4+1)=2^4 *3*7
4^x * 21=2^4 *21
2^2x=2^4
2x=4
x=2