Giúp mình với ạ 

 Tìm giá trị lớn nhất và nhỏ nhất của biểu thức M = 3√x−1 + 4√5 − x với mọi x thỏa mãn 1≤ x ≤ 5

Mạch như nào bạn ? 

a) I = \(\dfrac{U}{R}\) = \(\dfrac{16}{40}\) = \(\dfrac{2}{5}\) = 0,4 (A)
b) Khi I giảm đi 0,3 so với ban đầu
=> I' = 0,4 - 0,3 = 0,1 A 
=> U' = I' * R = 0,1 * 40 = 4 (V)

Using "I wished"

1.   The school authorities can’t set holidays based on local weather conditions.

2.   That university often doesn’t attract enough enrolments for the new school year.          

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3.   We can’t study the books written by famous scholars in the Ly and Tran dynasties because Chinese Ming aggressors took them to China.

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4.   Many small children don’t learn how to swim so they often suffer from drowning.       

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5.   Many graduates from college don’t have enough skills to meet the requirements of their jobs.

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Rewrite the sentences using “used”

8. I would go jogging regularly in the park when I was a boy. 

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9. Bill is accustomed to doing DIY at home. 

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10. She often skipped class in the past but now she no longer does that. 

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II. Write full sentences using the words given 

1. I / grow up / small / town / northeast / England.

_____________________________________________________________________2. And / now / I / live / London / , / which / much / big / place / compare / to where /I / grew up /./

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3. When / I / child / , / I / use / walk / everywhere / . 

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4. The / town /small /that /you /could /walk /one side /other /and / you / never / really / need / car /. 

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5. When /I/ young /, / mealtimes / use / quite predictable /. 

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6. And / we'd / eat / similar / foods / every day /, / consist / meat /, / potatoes /, /root vegetables.

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7. We / never / used / have / varied meals /, / whereas / now / my diet / change/ a lot/. /

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8. I / not / eat / meat / anymore /. 

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9. I / have / diet / that's all / vegetables / and / fruit /.

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10.  I / more / adventure / what / I / eat / now / than / what / I / do / when / I/child/.

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Giúp mình với mấy bạn :3