S= 1.6+2.9+3.12+4.15+...+98.297+99.300

hoặc

S= 1.6+2.9+3.12+4.15+...+97.297+98.300

đề sai một trong hai chỗ đó nha bn

S= 1.6+2.9+3.12+4.15+...+98.297+99.300

S = 1.6 + 2.9 + 3.12 + 4.15 + ...+ 98.297 + 99.300

S = 1.(2.3) + 2.(3.3) +3.(3.4)+4.(3.5) + ...+98.(99.3) + 99.(100.3)

S = 1.2.3 + 2.3.(4-1) + 3.4.(5-2) + 4.5.(6-3) + ...+98.99.(100-97) + 99.100.(101-98)

S = 1.2.3 + 2.3.4 - 1.2.3 + 3.4.5 - 2.3.4 + 4.5.6 - 3.4.5 + ...+ 98.99.100 - 97.98.99 + 99.100.101 - 98.99.100

S =99.100.101

S = 999 900

tính sao bạn

ko phải đâu, - 80 đấy bạn

a)  \(2^6.3^3.12^2=2^{2.3}.3^3.12^2=4^3.3^3.12^2=12^3.12^2=12^5\)

b)  \(20^4:2^6=\left(2^2.5\right)^4:2^6=2^8.5^4:2^6=2^2.5^4=2^2.25^2=50^2\)

c) \(100^3:2^5=\left(25.2^2\right)^3:2^5=25^3.2^6:2^5=25^3.2\)

d) \(125^2.9^3.2^6=\left(5^3\right)^2.\left(3^2\right)^3.2^6=5^6.3^6.2^6=30^6\)

e) \(81^4.9^2.3^7= \left(3^4\right)^4.\left(3^2\right)^2.3^7=3^{16}.3^4.3^7=3^{27}\)

g) \(250^6:5^5=\left(2.5^3\right)^6:5^5=2^6.5^{18}:5^6=2^6.5^{12}=50^6\)

1,2⁶.3³.2⁴.3²=2¹⁰.3⁵

2,2⁸.5⁴:2⁶=2².5⁴

3,2².5²:2⁵=\(\frac{1}{2^3}.5^2\)

4,5⁶.9².2⁶=10⁶.9²

5,3¹⁶.3⁴.3⁷=3²⁷

6,5¹⁸.2:5⁵=5¹³.2

\(2^6\cdot3^3\cdot12^2=2^6\cdot3^3\cdot\left(3\cdot2^2\right)^2\)

                           \(=2^6\cdot3^3\cdot3^2\cdot2^4\)

                              \(=2^{10}\cdot3^5\)

giải giúp mk vs ik mừ!!!

Giải

Không viết lại đề nha, mình làm tiếp luôn

=5/4*7/19+5/4*15/19-5/4*19/3

=5/4*(7/19+15/19-19/3)

=5/4*139/19

=965/76

=)