Tấn Phát 😎
Giới thiệu về bản thân
Hi there, i'm Phat, i'm from Hanoi, Hoai duc. I study at kim chung b primary. My favorite food is fast food(it's not good for life):))))))))
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2025-08-12 22:50:47
???? wtf
2025-08-12 22:50:26
Ta có: \(\mid x - 2 \mid \geq 0 \forall x\)
=>\(- 10 \mid x - 2 \mid \leq 0 \forall x\)
=>\(A = - 10 \mid x - 2 \mid - 22 \leq - 22 \forall x\)
Dấu '=' xảy ra khi x-2=0
=>x=2
2025-08-12 22:50:08
hỏi đáp ko có coin hay xu đâu bạn nhé
2025-08-12 22:49:28
ê tôi giải bằng lập trình đấy =3
2025-08-12 22:48:40
Rút gọn biểu thức Bcap B𝐵: Biểu thức đã cho là B=-1+12−122+...+122n+1cap B equals negative 1 plus one-half minus the fraction with numerator 1 and denominator 2 squared end-fraction plus point point point plus the fraction with numerator 1 and denominator 2 raised to the 2 n plus 1 power end-fraction𝐵=−1+12−122+...+122𝑛+1.
Đây là một chuỗi hình học với tỉ số r=−12r equals negative one-half𝑟=−12.
B=-1⋅(1−(−12)2n+2)1−(−12)cap B equals the fraction with numerator negative 1 center dot open paren 1 minus open paren negative one-half close paren raised to the 2 n plus 2 power close paren and denominator 1 minus open paren negative one-half close paren end-fraction𝐵=−1⋅(1−(−12)2𝑛+2)1−(−12)
B=−(1−(12)2n+2)1+12cap B equals the fraction with numerator negative open paren 1 minus open paren one-half close paren raised to the 2 n plus 2 power close paren and denominator 1 plus one-half end-fraction𝐵=−(1−(12)2𝑛+2)1+12
B=−(1−122n+2)32cap B equals the fraction with numerator negative open paren 1 minus the fraction with numerator 1 and denominator 2 raised to the 2 n plus 2 power end-fraction close paren and denominator three-halves end-fraction𝐵=−(1−122𝑛+2)32
B=−23(1−122n+2)cap B equals negative two-thirds open paren 1 minus the fraction with numerator 1 and denominator 2 raised to the 2 n plus 2 power end-fraction close paren𝐵=−231−122𝑛+2
B=−23+23⋅22n+2cap B equals negative two-thirds plus the fraction with numerator 2 and denominator 3 center dot 2 raised to the 2 n plus 2 power end-fraction𝐵=−23+23⋅22𝑛+2
B=−23+13⋅22n+1cap B equals negative two-thirds plus the fraction with numerator 1 and denominator 3 center dot 2 raised to the 2 n plus 1 power end-fraction𝐵=−23+13⋅22𝑛+1 Kết quả: B=−23+13⋅22n+1cap B equals negative two-thirds plus the fraction with numerator 1 and denominator 3 center dot 2 raised to the 2 n plus 1 power end-fraction𝐵=−23+13⋅22𝑛+1
Đây là một chuỗi hình học với tỉ số r=−12r equals negative one-half𝑟=−12.
- 1. Nhận dạng chuỗi: Chuỗi có dạng tổng của các số hạng của một cấp số nhân.
- 2. Xác định số hạng đầu và tỉ số:
- Số hạng đầu a=-1a equals negative 1𝑎=−1.
- Tỉ số r=−12r equals negative one-half𝑟=−12.
- 3. Xác định số lượng số hạng:
- Số hạng thứ nhất: -1=(-1)⋅(−12)0negative 1 equals open paren negative 1 close paren center dot open paren negative one-half close paren to the 0 power−1=(−1)⋅(−12)0
- Số hạng thứ hai: 12=(-1)⋅(−12)1one-half equals open paren negative 1 close paren center dot open paren negative one-half close paren to the first power12=(−1)⋅(−12)1
- Số hạng thứ ba: −122=(-1)⋅(−12)2negative the fraction with numerator 1 and denominator 2 squared end-fraction equals open paren negative 1 close paren center dot open paren negative one-half close paren squared−122=(−1)⋅(−12)2
- ...
- Số hạng cuối cùng: 122n+1=(-1)⋅(−12)2n+1the fraction with numerator 1 and denominator 2 raised to the 2 n plus 1 power end-fraction equals open paren negative 1 close paren center dot open paren negative one-half close paren raised to the 2 n plus 1 power122𝑛+1=(−1)⋅(−12)2𝑛+1(vì 2n+12 n plus 12𝑛+1là số lẻ nên (−12)2n+1=−122n+1open paren negative one-half close paren raised to the 2 n plus 1 power equals negative the fraction with numerator 1 and denominator 2 raised to the 2 n plus 1 power end-fraction(−12)2𝑛+1=−122𝑛+1, khi nhân với -1negative 1−1sẽ ra 122n+1the fraction with numerator 1 and denominator 2 raised to the 2 n plus 1 power end-fraction122𝑛+1)
- Số lượng số hạng là 2n+1−0+1=2n+22 n plus 1 minus 0 plus 1 equals 2 n plus 22𝑛+1−0+1=2𝑛+2.
- 4. Áp dụng công thức tổng cấp số nhân:
B=-1⋅(1−(−12)2n+2)1−(−12)cap B equals the fraction with numerator negative 1 center dot open paren 1 minus open paren negative one-half close paren raised to the 2 n plus 2 power close paren and denominator 1 minus open paren negative one-half close paren end-fraction𝐵=−1⋅(1−(−12)2𝑛+2)1−(−12)
B=−(1−(12)2n+2)1+12cap B equals the fraction with numerator negative open paren 1 minus open paren one-half close paren raised to the 2 n plus 2 power close paren and denominator 1 plus one-half end-fraction𝐵=−(1−(12)2𝑛+2)1+12
B=−(1−122n+2)32cap B equals the fraction with numerator negative open paren 1 minus the fraction with numerator 1 and denominator 2 raised to the 2 n plus 2 power end-fraction close paren and denominator three-halves end-fraction𝐵=−(1−122𝑛+2)32
B=−23(1−122n+2)cap B equals negative two-thirds open paren 1 minus the fraction with numerator 1 and denominator 2 raised to the 2 n plus 2 power end-fraction close paren𝐵=−231−122𝑛+2
B=−23+23⋅22n+2cap B equals negative two-thirds plus the fraction with numerator 2 and denominator 3 center dot 2 raised to the 2 n plus 2 power end-fraction𝐵=−23+23⋅22𝑛+2
B=−23+13⋅22n+1cap B equals negative two-thirds plus the fraction with numerator 1 and denominator 3 center dot 2 raised to the 2 n plus 1 power end-fraction𝐵=−23+13⋅22𝑛+1 Kết quả: B=−23+13⋅22n+1cap B equals negative two-thirds plus the fraction with numerator 1 and denominator 3 center dot 2 raised to the 2 n plus 1 power end-fraction𝐵=−23+13⋅22𝑛+1
2025-08-12 22:47:12
bạn hãy tham gia trả lời các câu hỏi nhanh và chính xác, đầy đủ nhé!
2025-08-12 22:46:09
2025-08-12 22:40:13
bn gõ vào phần phân số ở phần câu trả lời hoặc gõ dấu "/" là đc
VD:a/b
2025-08-12 22:38:04
2025-08-12 22:36:12
có