Which of the following differential forms are exact? (y² – t²) dt + (2ty – y) dy O ye' dt – e' dy O 3 cos(3t – y) dt – cos(3t – y) dy COS COS - - - O (2t²y – 1) dt + t³ dy

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Which of the following differential forms are exact? Choose one or more.

Which of the following differential forms are
exact?
(y² – t²) dt + (2ty – y) dy
O ye' dt – e' dy
3 cos(3t – y) dt – cos(3t – y) dy
COS
COS
-
-
-
O (2t²y – 1) dt + t³ dy
-
Transcribed Image Text:Which of the following differential forms are exact? (y² – t²) dt + (2ty – y) dy O ye' dt – e' dy 3 cos(3t – y) dt – cos(3t – y) dy COS COS - - - O (2t²y – 1) dt + t³ dy -
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