\(\left(\dfrac{3}{5}\right)^{10}\cdot\left(\dfrac{5}{3}\right)^{10}-\dfrac{13^4}{39^4}+2014^0\\ =\left(\dfrac{3\cdot5}{5\cdot3}\right)^{10}-\dfrac{13^4}{\left(3\cdot13\right)^4}+1\\ =\left(\dfrac{15}{15}\right)^{10}-\dfrac{13^4}{3^4\cdot13^4}+1\\ =1^{10}-\dfrac{1}{81}+1\\ =\dfrac{80}{81}+1\\ =\dfrac{161}{81}\)
1/3 b = 5/3^2+ 5/3^3+5/3^4+...+5/3^20+5/3^21
5) (3-1/4+2/3) - (5-1/3-6/5) - (6-7/4+3/2) 6) (6-2/3+1/2) - (5+5/3-3/2)-(3-7/3+5/2)
7) (5/3-3/7+9)-(2+5/7-2/3)+(8/7-4/3-10) 8) (8-9/4+2/7)-(-6-3/7+5/4)-(3+2/4-9/7 pls help me
\(A=\frac{5^{^5}}{5+5^{^2}+5^{^3}+5^{^4}}\&B=\frac{3^{^5}}{3+3^{^2}+3^{^3}+3^{^4}}\)
(3-1/4+2/3) - (5-1/3-6/5) - (6-7/4+3/2) (6-2/3+1/2) - (5+5/3-3/2)-(3-7/3+5/2)
(5/3-3/7+9)-(2+5/7-2/3)+(8/7-4/3-10) (8-9/4+2/7)-(-6-3/7+5/4)-(3+2/4-9/7 )
mọi người ơi giúp mik với ạ
Bài 1
a, Tính P=1+1/2(1+2)+1/3(1+2+3)+1/4(1+2+3+4)+....+1/2012(1+2+3+...+2012)
b,Tìm x thỏa mãn 4^5+4^5+4^5+4^5/3^5+3^5+3^5.6^5+6^5+6^5+6^5+6^5+6^5/2^5+2^5=2^x
1,4 . 3x-2 + 2 . 3x+1 = 4 . 34 + 2 . 37
2, \(\dfrac{3}{5}\) . 2x + \(\dfrac{7}{5}\) . 2x+3 = \(\dfrac{3}{5}\) . 210 + \(\dfrac{7}{5}\) . 213
3,\(\dfrac{5}{3}\) . 8x+2 - \(\dfrac{3}{5}\) . 8x = \(\dfrac{5}{3}\) . 811 - \(\dfrac{3}{5}\) . 89
4,(\(\dfrac{1}{2}\) - \(\dfrac{1}{6}\)).3x+4 - 4 . 3x = 316 - 4 . 319
Mn làm giúp em với ạ , em cảm ơn !
Tính:
a) -5/7(14/5 - 7/10) : |-2/3| - 3/4(8/9 + 16/3) + 10/3(1/3 + 1/5)
b) 17/-26(1/6 - 5/3) : 17/13 - 20/3(2/5 - 1/4) + 2/3(6/5 - 9/2)
c) -8/9(9/8 - 3/2) + 5/4 : (5/2 - 15/4) - 3/4(10/9 - 8/3) : (-1/3)
d) 21/10 : (12/5 - 9/10) . (-4/7) - 3/2(1/6 - 7/12) + 1/5(3/2 - 1/4)
3/5*7^2-3*5^6+3/5*3^9//3/4*7^2-3/4*5^7+3/4*3^9
Tìm x nguyên sao cho:
a) 5*3^x+6 = 2*3^5 + 3*3^5
b) 5^x+4-3*5^x+3=2*5^4
