Academic Research in Educational Sciences
VOLUME 2 | CSPI CONFERENCE 3 | 2021
Zamonaviy ta'limda matematika, fizika va raqamli texnologiyalarning dolzarb muammolari va yutuqlari
Toshkent viloyati Chirchiq davlat pedagogika instituti
Google Scholar
Scientific Library of Uzbekistan
Academic Research, Uzbekistan 38 www.ares.uz
U holda ishlatiladigan material hajmi quyidagiga teng bo‘ladi:
𝑉 = 𝜋(𝑥 + 𝑑)
2
+ 𝜋[(𝑥 + 𝑑)
2
− 𝑥
2
]ℎ = 𝜋𝑑(𝑥 + 𝑑)
2
+ 𝜋ℎ(2𝑥𝑑 + 𝑑
2
)
1-rasm 2-rasm
2- tomondan, shartga ko‘ra
𝑉
0
= 𝜋𝑥
2
ℎ, ℎ =
𝑉
0
𝜋𝑥
2
U holda sarflanadigan material hajmi quyidagi funksiya ko‘rinishiga ega bo‘ladi:
𝑉 = 𝜋𝑑 = (𝑥 + 𝑑)
2
+
𝜋𝑉
𝜋𝑥
2
∙ (2𝑥𝑑 + 𝑑
2
) = 𝜋𝑑(𝑥 + 𝑑)
2
+
2𝑉
0
𝑑
𝑥
+
𝑉
0
𝑑
2
𝑥
2
Bu funksiyani
0
x
ga ekstremumga tekshiramiz. Buning uchun hosila olamiz.
𝑉
′
(𝑥) = 2𝜋𝑑(𝑥 + 𝑑) −
2𝑉
0
𝑑
𝑥
+
2𝑉
0
𝑑
2
𝑥
2
=
2𝑑(𝑥 + 𝑑)(𝜋𝑥
3
− 𝑉
0
)
𝑥
3
𝑉
′
(𝑥) = 0 ⇒ 2𝑑(𝑥 + 𝑑)(𝜋𝑥
3
− 𝑉
0
) = 0
Bu tenglamaning yagona
musbat yechimi bor
𝑥 = √
𝑉
0
𝜋
3
Endi
h
ning qiymatini aniqlaymiz.