Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
volume benda putar - matematika XII IPA?
volume benda putar yang terjadi jika daerah yang dibatasi kurva y=1-x^2 dan garis y= -1 diputar pada sumbu y adalah
2 Answers
- Nur°FLv 78 years agoFavorite Answer
y = 1 - x^2
simetris dg x = 0
yp = -(b² - 4ac)/4a = -(0² - 4(-1)(1))/4(-1) = 1
batas integral dari y = -1 sampai y = 1
y = 1 – x² → x² = 1 - y
V = π ∫ x² dy = π∫(1 – y)dy
………………...1
= π(y – (1/2)y²) ]
………………..-1
= π((1 – (1/2)(1²)) - ((-1) – (1/2)(-1²))
= π((1/2) + (3/2))
= 2π satuan volume
