Thẻ: Hoc tap 2022

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Tính tích phân sau (I = intlimits_1^e {xln x,dx} ).

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Câu hỏi: Tính tích phân (I = intlimits_1^e {xln x,dx} ). Lời giải tham khảo: Đáp án đúng: C Đặt (left{ begin{array}{l}u = ln x\dv = xdxend{array} right. Rightarrow left{ begin{array}{l}du = dfrac{1}{x}dx\v = dfrac{{{x^2}}}{2}end{array} right.) Khi đó ta có: (I = intlimits_1^e {xln x,dx}  ) (= left( {dfrac{{{x^2}}}{2}ln x} right)left| begin{array}{l}^e\_1end{array} right. – intlimits_1^e […]

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Question 45: Read The Following Passage and Mark The Letter A, B, C, OR D on Your Answer Sheet To Indicate The Correct Answer to Each Of The Questions. Nowadays, Most People Realize That It’s Risky To Use Credit Card Numbers Online. However, From Time To Time, We All Use Passwords and Government ID Numbers On The Internet. We Think We Are Safe, But That May Not Be True! A New Kind Of Attack ‌is‌ ‌being‌ ‌used‌ ‌by‌ ‌dishonest‌ ‌people‌ ‌to‌ ‌steal‌ ‌IDs‌ ‌and‌ ‌credit‌ ‌card numbers‌ ‌from‌ ‌innocent‌ ‌web‌ ‌surfers.‌ ‌This‌ ‌new‌ ‌kind‌ ‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌ ‌is‌ Phishing Sounds The Same As The Word “Fishing,” and IT Implies That A Thief Is Trying To Lure People Into Giving Away Valuable Information. Like Real Fishermen, Phishers Use Bait In The Form Of Great Online Deals or Services. For Example, Phishers Might Use Fake Emails and False Websites to the People Into Revealing Credit Card Numbers, Account Username, and Passwords. They Imitate Well-Known Banks, Online Sellers, and Credit Card Companies. ‌ ‌Successful‌ ‌phishers‌ ‌may‌ ‌convince‌ ‌as‌ ‌many‌ ‌as‌ ‌five‌ ‌percent‌ ‌of the‌ ‌people‌ ‌they‌ ‌contact‌ ‌to‌ ‌respond‌ ‌and‌ ‌give‌ ‌away‌ ‌theirancial‌ ‌personal‌ ‌away‌ ‌ ‌Is‌ ‌this‌ ‌really‌ ‌a‌ ‌big‌ ‌problem?‌ ‌Actually, ‌ ‌tricking‌ ‌five‌ ‌percent‌ ‌of‌ ‌the‌ ‌online‌ ‌population‌ ‌is‌ ‌huge! Currently, More Than 350 Million People Have Access To The Internet, and Seventy-Five Percent Of Those Internet Users Live in The Wealthiest Countries On Earth. It Has Been Estimated That Phishers Send More Three Three Billion Scam Messages Each Year. ‌Even‌ ‌by‌ ‌tricking‌ ‌only‌ ‌five‌ ‌percent‌ ‌of‌ ‌people, ‌phishers‌ ‌can‌ ‌make‌ ‌a‌ ‌lot‌ ‌of‌ ‌money. Since There Is So Much Money To Make Through This Kind Of Scam, It Has Caught The Interest Of More Than Just Small-Time Crooks. Recently, Police Tracked Down Members Of An Organized Phishing Group Print Eastern Europe, Who Had Stolen Hundreds of Thousands of Dollars from People Online. The Group Created Official-Looking Email Messages Requesting People to Update Their Personal Information At An International Bank’s Website. However, The Link to The Bank In The Message Actually Sent People ‌to ‌the phishers’‌ ‌fake‌ ‌website.‌ ‌make‌ ‌matters‌ ‌worse, ‌ ‌further‌ ‌investigation‌ ‌revealed‌ ‌that‌ ‌this‌ ‌group‌ ‌had connections‌ ‌to‌ ‌to‌ ‌Russia‌‌‌‌‌ ‌gang‌ How Can Innocent People Protect Themselves? Above All, They Have To Learn to Recognize Email That Has Been Sent by A Phisher. Always Be Wary Of Any Email With Urgent Requests For Personal Financial Information. Phishers Typically Write Upsetting OR Exciting, But Fake, Statements in Their Emails So That People Will Reply Right Right Away. Also, Messages From Phishers Will Not Address Recipients by Name Because Thy Really Doly Don’t Know Who The Recipients Are Yet. On the Other ‌hand,‌ ‌valid‌ ‌messages‌ ‌from‌ ‌your‌ ‌bank‌ ‌or other‌ ‌companies‌ ‌you‌ ‌normally‌ ‌deal‌ ‌with‌ ‌will‌ ‌typically‌ ‌include‌ ‌your‌ ‌personal‌ ‌name. ‌ ‌According‌ ‌to paragraph‌ ‌3,‌ ‌why‌ ‌are‌ ‌only‌ ‌5%‌ ‌of‌ ‌online‌ ‌users‌ ‌tricked‌ ‌a‌ ‌big‌ ‌problem? ‌ ‌

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Question 45: Read The Following Passage and Mark The Letter A, B, C, OR D on Your Answer Sheet To Indicate The Correct Answer to Each Of The Questions. Nowadays, Most People Realize That It’s Risky To Use Credit Card Numbers Online. However, From Time To Time, We All Use Passwords and Government ID Numbers […]

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Trong không gian với hệ toạ độ (Oxyz), cho biết hai đường thẳng ({d_1},{d_2})lần lượt có phương trình ({d_1}:dfrac{{x – 2}}{2} = dfrac{{y – 2}}{1} = dfrac{{z – 3}}{3}), ({d_2}:dfrac{{x – 1}}{2} = dfrac{{y – 2}}{{ – 1}} = dfrac{{z – 1}}{4}). Phương trình mặt phẳng (left( alpha right)) cách đều hai đường thẳng ({d_1},{d_2}) là:

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Trong không gian với hệ toạ độ (Oxyz), cho biết hai đường thẳng ({d_1},{d_2})lần lượt có phương trình ({d_1}:dfrac{{x – 2}}{2} = dfrac{{y – 2}}{1} = dfrac{{z – 3}}{3}), ({d_2}:dfrac{{x – 1}}{2} = dfrac{{y – 2}}{{ – 1}} = dfrac{{z – 1}}{4}). Phương trình mặt phẳng (left( alpha right)) cách đều hai đường thẳng ({d_1},{d_2}) […]

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Cho biết miền (D) giới hạn bởi các đường sau: (y = sqrt x ,,,y = 2 – x,,,y = 0). Diện tích của miền (D) có giá tri là:

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Câu hỏi: Cho miền (D) giới hạn bởi các đường sau: (y = sqrt x ,,,y = 2 – x,,,y = 0). Diện tích của miền (D) có giá tri là: Lời giải tham khảo: Đáp án đúng: B Phương trình hoành độ giao điểm giữa các đường thẳng là(left{ begin{array}{l}2 – x = 0\sqrt […]

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Cho biết điểm (Ileft( {1;1; – 2} right)) đường thẳng (d:dfrac{{x + 1}}{1} = dfrac{{y – 3}}{2} = dfrac{{z – 2}}{1}.) Phương trình mặt cầu (left( S right))có tâm I và cắt đường thẳng d tại hai điểm A, B sao cho tam giác IAB đều là:

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Bạn đang ở:Trang chủ / Đề thi TN THPT môn Toán 2022 / Cho biết điểm (Ileft( {1;1; – 2} right)) đường thẳng (d:dfrac{{x + 1}}{1} = dfrac{{y – 3}}{2} = dfrac{{z – 2}}{1}.) Phương trình mặt cầu (left( S right))có tâm I và cắt đường thẳng d tại hai điểm A, B sao cho […]

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