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Menjelaskan persamaan diferensial orde 1
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Matematika Teknik 3 Dr. Ahmad Sabri Universitas Gunadarma
dan diperoleh bentuk diferensial berikut: ๐(๐ฅ, ๐ฆ)๐๐ฅ + ๐(๐ฅ, ๐ฆ)๐๐ฆ = 0.
๐ฅ๐ฆโฒ โ ๐ฆ 2 = 0 Bentuk standar ๐ฆ = ๐(๐ฅ, ๐ฆ): ๐ฅ๐ฆ โฒ = ๐ฆ 2 ๐ฆ โฒ = ๐ฆ 2 ๐ฅ Bentuk diferensial ๐(๐ฅ, ๐ฆ)๐๐ฅ + ๐(๐ฅ, ๐ฆ)๐๐ฆ = 0 : ๐ฅ ๐๐ฆ ๐๐ฅ โ ๐ฆ 2 = 0 ๐ฅ ๐๐ฆ โ ๐ฆ 2 ๐๐ฅ = 0 (dalam hal ini ๐ ๐ฅ, ๐ฆ = ๐ฅ; ๐ ๐ฅ, ๐ฆ = โ๐ฆ 2
Periksalah apakah PD berikut homogen
๐ฆ+๐ฅ ๐ฅ Penyelesaian: ๐ ๐ฅ, ๐ฆ = ๐ฆ+๐ฅ ๐ฅ ๐ ๐ก๐ฅ, ๐ก๐ฆ = ๐ก๐ฆ+๐ก๐ฅ ๐ก๐ฅ
๐ก(๐ฆ+๐ฅ) ๐ก๐ฅ
๐ฆ+๐ฅ ๐ฅ = ๐(๐ฅ, ๐ฆ) (PD homogen)
Periksalah apakah PD berikut terpisahkan
2 2 3 2
= โ = = Carilah solusi dari PD berikut:
Periksalah apakah PD berikut adalah eksak
2 ๐ฆ ๐๐ฅ + ๐ฆ + ๐ฅ 3 ๐๐ฆ = 0 eksak? Penyelesaian: ๐ ๐ฅ, ๐ฆ = 3 ๐ฅ 2 ๐ฆ; ๐ ๐ฅ, ๐ฆ = ๐ฆ + ๐ฅ 3 ๐๐(๐ฅ,๐ฆ) ๐๐ฆ
2 ; ๐๐(๐ฅ,๐ฆ) ๐๐ฅ
2 ๐๐(๐ฅ,๐ฆ) ๐๐ฆ
๐๐(๐ฅ,๐ฆ) ๐๐ฅ
2 PD tersebut eksak