Contact Us

Set a = {x | K faction + faction / 4 is less than or equal to x, less than or equal to K faction + faction / 2, K belongs to Z}, set B = {x | 6 + x-x ^ 2 is greater than or equal to 0}, find a intersection B (faction is the one equal to 3.1415926 Because of the mobile phone, I can't get a pie,

A={x|kπ＋π/4≤x≤kπ＋π/2,k∈Z},
B={x|6+x-x^2≥0}={x|-2≤x≤3}
A ∩ B = {x | - 2 ≤ x ≤ - π / 2 or π / 4 ≤ x ≤ π / 2}