`B=2+2^2+2^3+...........+2^{100}`
`2B=2^2+2^3+2^4+...........+2^{101}`
`2B-B=(2^2+2^3+2^4+...........+2^{101})-(2+2^2+2^3+...........+2^{100})`
`B=2^{101}-2`
`C=5-2^{100}+B`
`C=5-2^{100}+2^{101}-2`
`C=2^{100}(2-1)+(5-2)`
`C=2^{100}+3`
Vậy `C=2^{100}+3`
Đáp án:
Giải thích các bước giải:
$B=2+2^2+2^3+2^4+...+2^{100}\\\Leftrightarrow 2B=2^2+2^3+2^4+2^5+...+2^{101}\\\Leftrightarrow 2B-B=2^{101}-2=B\\\Rightarrow C=5-2^{100}+2^{101}-2\\=2^{100}(2-1)+3\\=2^{100}+3$
giúp: cho hình bình hành ABCD gọi M,N lần lượt là trung điểm của AB,BC.DM cắt AC ở I.DN cắt AC ở K a,Chứng Minh AI=IK=KC b,Chứng minh IK=2/3MN
17. Everything about the future is uncertain, but one thing is certain: God has arranged for all of us tomorrow. Right now we must trust him and in this regard you must be very patient. 18. If a drop falls into a lake, it will disappear. But if it falls on a lotus leaf, it shines like a jewel. Falling the same, but being with someone is what matters. 19. Don't hide your love and tenderness until you die. Fill your life with sweetness. Speak loving words while you can hear them and your heart still flutter. 20. Sincerity is the best thing you can give a person. Truth, trust, friendship and love all depend on that. 21. No matter how big your house, no matter how much money you just bought a brand-new car, or even how much money you have in your bank account, your grave is just as much. that size. Be humble. dịch sang tiếng việt
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Giúp mik bài tập này ik mik sẽ vote 5 sao và câu trả lời hay nhất
Giúp mik với ạ, nhanh lên với các cao nhân ơi!!!!!!!!!
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cho x= (√3-1)/2 y= (√3+1)/2. tính x^5+y^5 giúp với ạ!!!
alo các bạn ơi cho mình xin bản phát âm /s/ và /ed/ nhé
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