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Rozemey
@Rozemey
July 2022
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Найдите множество значений функции [tex]y=\sqrt{ 20-16 cos x} [/tex]
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Алкадиеныч
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Решение на фотографии
4 votes
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dasdasfa
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Y=√(20-16cosx)
D(y)= [-1;1] 20-16cosx≥0; cosx≤20/16; cosx≤5/4; |cosx| ≤1;
f(-1)= √(20-16*(-1))=6;
f(1)=√(20-16=2
E(y)=[2;6]
2 votes
Thanks 3
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Verified answer
Решение на фотографииVerified answer
Y=√(20-16cosx)D(y)= [-1;1] 20-16cosx≥0; cosx≤20/16; cosx≤5/4; |cosx| ≤1;
f(-1)= √(20-16*(-1))=6;
f(1)=√(20-16=2
E(y)=[2;6]