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Verified answer
Jawaby =x²+1
x+ y = 7
..............(-)
x = x²- 6
x² -x - 6 = 0
(x -3)(x +2) = 0
x =3 atau x = -2
x + y = 7
y = 7 - x
y = 0, x = 7
daerah arsiran dibatasi
x =0 sd x = 3 untuk y= x² + 1 dan
x= 3 sd x = 7 untuk y = 7 - x
Luas =
₀³∫ (x²+1) dx + ₃⁷∫ (7 - x) dx =
=[1/3 x³ + x]³₀ + [7x - 1/2 x²]⁷₃
= 1/3(27) + (3)+ 7(7-3) - 1/2(49-9)
= 9 + 3 + 28 - 20
= 20