1+2-3-4+5+6-7-8+9+...+97+98-99-100+101+102
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Những câu hỏi liên quan
1 + 2 + 3 - 4 - 5 - 6 + 7 + 8 +9 - 10 - 11- 12 +..... + 97 + 98 + 99 - 100 - 101 - 102
1+2+3-4-5-6+7+8+9-10-11-12+.........+97+98+99-100-101-102
1+2+3-4-5-6+...+97+98+99-100-101-102
=(1+2+3-4-5-6)+...+(97+98+99-100-101-102) có 17 cặp số
=(-9)+(-9)....+(-9) 17 cặp số
=(-9).17=-153
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1+2+3-4-5-6+7+8+9-10-11-12+...+97+98+99-100-101-102
D= 1+2+3-4-5-6+7+8+9-10-11-12+........+97+98+99-100-101-102
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D = 1+2+3-4-5-6+7+8+9-10-11-12+........+97+98+99-100-101-102
D = (1+2+3-4-5-6) + (7+8+9-10-11-12) + ........... + (97+98+99-100-101-102)
D = (-9) + (-9) + .......... + (-9) có 17 số -6
D = -6.(-9)
D = 54
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tính tổng:
1+2+3-4-5-6+7+8+9-10-11-12+.....+97+98+99-100-101-102
con nay la 1209876
111111111111000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%
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(1+2+3-4-5-6)+(7+8+9-10-11-12)+....+(97+98+99-100-101-102)=-27+-27+...+-27
=-27*17=-153
neu dug thi tk nha
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tính
A=1*3+3*5+5*7+............+97*99+99*101
B=2*4+4*6+6*8+...............+98*100+100*102
Tính tổng : a) S2 = 1 - 3 + 5 - 7 + 9 - 11 + ... + 2005 - 2007. b) S3 = 1 + 2 + 3 - 4 - 5 - 6 + 7 + 8 + 9 - 10 - 11 - 12 + ... + 97 + 98 + 99 - 100 - 101 - 102
Tính:
D = 1+2+3-4-5+7+8+9-10-11-12+...+97+98+99-100-101-102
x=1+2+3-4-5-6+7+8+9-10-11-12+...+97+98+99-100-101-102
Giúp mình nha.
Ai nhanh mình tick
x=(1+2+3-4-5-6)+...+(97+98+99-100-101-102)
x=-9+...+-9
x=-9.17
x=-153