Expression 4: "y" equals "b" "x" left brace, 0 less than or equal to "x" less than or equal to StartFraction, 7 Over StartRoot, "b" squared plus 1 , EndRoot , EndFraction , right bracey=bx0≤x≤7b2+1
4
Expression 5: "b" equals 2.5b=2.5
negative 10−10
1010
5
Expression 6: "x" equals StartFraction, 7 Over StartRoot, "b" squared plus 1 , EndRoot , EndFraction left brace, StartFraction, 7 "b" Over StartRoot, "b" squared plus 1 , EndRoot , EndFraction greater than or equal to "y" greater than or equal to 0 , right bracex=7b2+17bb2+1≥y≥0
6
Expression 7: "x" equals StartFraction, 7 Over StartRoot, "a" squared plus 1 , EndRoot , EndFraction left brace, StartFraction, 7 "a" Over StartRoot, "a" squared plus 1 , EndRoot , EndFraction greater than or equal to "y" greater than or equal to 0 , right bracex=7a2+17aa2+1≥y≥0