Question

4^x+1+4^x+2-4^x-1-4^x-2=315 resolva em R a equaçao

Answer 1

Ola Anne

4^(x+1) + 4^(x+2) - 4^(x-1) - 4^(x-2) = 315

4*4^x + 16*4^x - 4^x/4 - 4^x/16 = 315

64*4^x + 256*4^x - 4*4^x - 4^x = 16*315

4^x*(64 + 256 - 4 - 1) = 16*315

4^x*(315) = 16*315

4^x = 16 = 4^2

x = 2