Question

∫ª (x³-16x) dx = -36 tentukan a
²

Answer 1

|1/4 x⁴ - 8x² |ᵃ₂ = - 36

1/4 (a⁴ -2⁴) - 8(a² - 2²) = - 36  ...kalikan 4
(a⁴-16) - 32(a² - 4) = - 144
a⁴ - 16 - 32 a² + 128 = - 144
a⁴ - 32 a² + 256 = 0
(a² - 16)² = 0
a² -16 = 0
a = 4 atau a = -4
a > 2 --> a = 4