7^х+2 +4*7^х+1=539 3^х -3^х-2>72

Question

7^х+2 +4*7^х+1=539
3^х -3^х-2>72

Answer 1

1) 7^(x +1) ( 7 + 4) = 539
     7^(x +1) * 11 = 539
     7^(x +1) = 49
      x +1 = 2
      x = 1
2) 3^(x -2)(3² -1) > 72
     3^(x -2) *8 > 72
      3^(x -2) > 9
      x - 2 > 2
      x > 4