5的(x+2)次方大于2
3的(3-x)次方小于6
5的(x+2)次方大于2
3的(3-x)次方小于6
1、5 ^ (x+2) >2
x+2 > log 5 (2)...............(以5为底,2的对数)
x > log 5 (2) — 2
x > log 5 (2) — log 5 (25)
x > log 5 (2/25)
2、3 ^ (3-x) <6
3-x < log 3 (6)................(以3为底,6的对数)
x > 3 — log 3 (6)
x > log 3 (27) — log 3 (6)
x > log 3 (27/6)
x > log 3 (9/2)