A) o’zgarmasni va ratsialash.
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B) yechib bo’lmaydi.
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C) o’ng tomoni xususiy yechimni tanlab.
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D)* tartibni pasaytirib.
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289.
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d 2 y
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cos2x tenglamani yeching.
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dx2
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A) y
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1
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sin 2x C x C
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B) y
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1
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sin 2x C x C
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;
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4
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1
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2
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4
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1
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2
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C) y
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1
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sin 2x C ;
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D)* y
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1
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cos2x C x C
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4
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1
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4
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2
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270. yy y2
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y 2 tenglamani qanday usul bilan yechish mumkin?
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A) Bernulli formulasi bilan.
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B) Klero formulasi bilan.
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C) o’zgarmasni variatsiyalash.
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D)* tartibini pasaytirib.
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271. (1 x2 ) y 2xy 0 tenglamani yeching.
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A)
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y C (x x3 ) C
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;
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B) y C (1 x3 ) C ;
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1
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2
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1
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2
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C)
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y C (3x x3 ) C
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;
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D)* y C (3 x3 ) C
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1
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1 2 y
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2
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1
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2
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272. y
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tenglama qanday o’rniga qo’yish orqali yechiladi?
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y
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A) y p(x) ; B) y p(x) ;
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C) * y p( y) ;
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D) y p( y) .
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273. ysin x ycos x tenglamani yeching.
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A) y C1 cos x C2 x ;
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B) y C1 sin x C2 x ;
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C) * y C1 cos x C2 ;
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D) y C1tgx C2 .
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274.
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d 2 y
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1
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2
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tenglamani yeching.
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dx2
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x2
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A) y x
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1
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C
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B) y x2 ln | x | C x C
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;
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x
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1
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1
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2
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C) y
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x2
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ln | x | C ;
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D)* y
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x2
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2ln | x | C x C
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2
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