b. Show on the real line and indicate in symbols each of the following:
S₁= {x: -7 < x < ∞ } ∩ {x: -∞ < x < 3}
S₂= (x:x ≥ ∞ } ∩ (x: x+ 3 < 6}
S3 = y: y²-2 y-3 < 0} U {y: -2 ≤ y ≤ 1}
S1S_1S1
S2={x:x≥0}∩{x:x+3<6}S_2= \{x:x ≥ 0 \} ∩ \{x: x+ 3 < 6\}S2={x:x≥0}∩{x:x+3<6}
S2S_2S2
S3S_3S3
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