`= 100 - [60-(9-2)^2].3^2`
`= 100 - [60 - 49].9`
`= 100 - 11.9`
`= 100 -99`
`= 1`
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Các câu hỏi tương tự
a)5^6:5^4+3^2-2021^0
b)100-[60-(9-2^3).34].2
A=100-[60-(9-2)2]x33x70
Tính
1+4+5+9+14+...+60+97
5+9+13+...+2005+2009+2013
3+6+9+...+108
1×2+2×3+3×4+4×5+...+98×99+99×100
14 tháng 5 2022 lúc 9:48
Rút gọn các tổng sau:a) A 2 - 2^2 + 2^3 - 2^4 + ... + 2^{99} - 2^{100}b) B 1 + 2^2 + 2^4 + ... + 2^{98} + 2^{100}c) C 1 - 2^3 + 2^6 - 2^9 + ... + 2^{60} - 2^{63} + 2^{69}d) D 1 + dfrac{1}{3} + dfrac{1}{3^2} + dfrac{1}{3^4} + ... + dfrac{1}{3^{100}}e) E 1 - dfrac{1}{4} + dfrac{1}{4^2} - dfrac{1}{4^3} + ... + dfrac{1}{4^{98}} - dfrac{1}{4^{99}} + dfrac{1}{4^{100}}
Đọc tiếp
Rút gọn các tổng sau:
a) A = 2 - 2\(^2\) + 2\(^3\) - 2\(^4\) + ... + 2\(^{99}\) - 2\(^{100}\)
b) B = 1 + 2\(^2\) + 2\(^4\) + ... + 2\(^{98}\) + 2\(^{100}\)
c) C = 1 - 2\(^3\) + 2\(^6\) - 2\(^9\) + ... + 2\(^{60}\) - 2\(^{63}\) + 2\(^{69}\)
d) D = 1 + \(\dfrac{1}{3}\) + \(\dfrac{1}{3^2}\) + \(\dfrac{1}{3^4}\) + ... + \(\dfrac{1}{3^{100}}\)
e) E = 1 - \(\dfrac{1}{4}\) + \(\dfrac{1}{4^2}\) - \(\dfrac{1}{4^3}\) + ... + \(\dfrac{1}{4^{98}}\) - \(\dfrac{1}{4^{99}}\) + \(\dfrac{1}{4^{100}}\)
a) A=1-2+3-4+5-6+.........+99-100+101
b) B=1+4+5+9+14+......+60+97
c) C=100+98+96+....+2-97-95-.......-1
d) D=1+2-3-4+5+6-7-8+9+10-11-12+.......+299-300+301+302
\(M=\frac{\text{2 . 6 . 10 + 4 . 12 . 20 + 6 . 18 . 30 + ..... + 20 . 60 . 100}}{\text{1 . 2 . 3 + 2 . 4 . 6 + 3 . 6 . 9 + ..... + 10 . 20 . 30}}\)
Tính
A=1+3+5+...+101
B=1+4+7+10+...+100
C=100-99+98-97+...+2-1
D=1+4+5+9+14+...+60+97
E=1+2-3-4+5+6-7-8+...-299-300+301+302
Rút gọn phân số sau:
\(M=\frac{\text{2 . 6 . 10 + 4 . 12 . 20 + 6 . 18 . 30 + ..... + 20 . 60 . 100 }}{\text{1 . 2 . 3 + 2 . 4 . 6 + 3 . 6 . 9 + ..... + 10 . 20 . 30}}\)
1.Tính:
A= 1 + 2 + 2 mũ 2 + ............+ 2 mũ 60
B = 3 + 3 mũ 3 + 3 mũ 5 + ............. + 3 mũ 81
C = 2 mũ 3 + 2 mũ 6 + 2 mũ 9 + ........... + 2 mũ 90
D = 3 mũ 100 - 3 mũ 90 + 3 mũ 98 - .................... 3