Bài 5: Lũy thừa của một số hữu tỉ
Các câu hỏi tương tự
Bài 1: Tìm x, biết
\(a,\frac{2}{3}-\frac{1}{3}.\left(x-\frac{3}{2}\right)-\frac{1}{2}.\left(2x+1\right)=5\)
\(b,\left(x+\frac{1}{2}\right).\left(x-\frac{3}{4}\right)=0\)
\(c,\left(2x-5\right)^4=81\)
\(d,3^{x+1}+3^{x+3}=810\)
4. Tìm x biết:
a) (3x - 7)5 0;
b) frac{1}{4} - (2x - 1)2 0;
c) frac{1}{16} - (5 - x)3 frac{31}{64};
d) 2x (3,8)3 : (-3,8)2;
e) left(frac{27}{64}right)^9. x left(-frac{3}{4}right)^{32};
f) 5^{left(x+5right)left(x^2-4right)} 1;
g) (x - 2,5)2 frac{4}{9};
h) left(2x+frac{1}{3}right)^3frac{8}{27}
Đọc tiếp
4. Tìm x biết:
a) (3x - 7)5 = 0;
b) \(\frac{1}{4}\) - (2x - 1)2 = 0;
c) \(\frac{1}{16}\) - (5 - x)3 = \(\frac{31}{64}\);
d) 2x = (3,8)3 : (-3,8)2;
e) \(\left(\frac{27}{64}\right)^9\). x = \(\left(-\frac{3}{4}\right)^{32}\);
f) \(5^{\left(x+5\right)\left(x^2-4\right)}\) = 1;
g) (x - 2,5)2 = \(\frac{4}{9}\);
h) \(\left(2x+\frac{1}{3}\right)^3=\frac{8}{27}\)
bài 2
q,\(\frac{11}{3}-\left(\frac{5}{42}-x\right)\)
b,\(x+\frac{1}{3}=\frac{2}{5}-\left(\frac{-1}{3}\right)\)
c,\(\frac{-2}{3}x+\frac{5}{7}=\frac{3}{10}\)
d,\(\frac{3}{7}-x=\frac{1}{4}-\left(\frac{-3}{5}\right)\)
Bài 1: Tính giá trị các biểu thức sau
a,left[2^{-3}-left(frac{3}{4}right)^{-4}.left(-frac{1}{2}right)^2right]:left[5-3left(frac{4}{15}right)^0right]^{-2}
b, frac{2^3+3.2^6-4^3}{2^3+3^2}
c, frac{5^5.20^3-5^4.20^3+5^7.4^5}{left(20+5right)^3.4^5}
d, frac{4^6.9^5+6^9.120}{8^4.3^{12}-6^{11}}
e, frac{5.left(3.7^{15}-19.7^{14}right)}{7^{16}+3.7^{15}}
f, frac{3^3.left(0,5right)^5}{left(1,5right)^4}
Mk cần gấp
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Bài 1: Tính giá trị các biểu thức sau
a,\(\left[2^{-3}-\left(\frac{3}{4}\right)^{-4}.\left(-\frac{1}{2}\right)^2\right]:\left[5-3\left(\frac{4}{15}\right)^0\right]^{-2}\)
b, \(\frac{2^3+3.2^6-4^3}{2^3+3^2}\)
c, \(\frac{5^5.20^3-5^4.20^3+5^7.4^5}{\left(20+5\right)^3.4^5}\)
d, \(\frac{4^6.9^5+6^9.120}{8^4.3^{12}-6^{11}}\)
e, \(\frac{5.\left(3.7^{15}-19.7^{14}\right)}{7^{16}+3.7^{15}}\)
f, \(\frac{3^3.\left(0,5\right)^5}{\left(1,5\right)^4}\)
Mk cần gấp
a,frac{-1}{24}-left[frac{1}{4}-left(frac{1}{2}-frac{7}{8}right)right]
b,left[frac{5}{7}-frac{7}{5}right]-left[frac{1}{2}-left(frac{-2}{7}-frac{1}{10}right)right]
c,left(frac{-1}{2}right)-left(frac{-3}{5}right)+left(frac{-1}{9}right)+frac{1}{71}-left(frac{-2}{7}right)+frac{4}{35}-frac{7}{8}
d,left(3-frac{1}{4}+frac{2}{3}right)-left(5-frac{1}{3}-frac{6}{5}right)-left(6-frac{7}{4}+frac{3}{2}right)
e,left(frac{1}{2}-frac{13}{14}right):frac{5}{7}-left(frac{-2}{21}+frac{1}{7}right):frac{5}{7}
g,f...
Đọc tiếp
a,\(\frac{-1}{24}-\left[\frac{1}{4}-\left(\frac{1}{2}-\frac{7}{8}\right)\right]\)
b,\(\left[\frac{5}{7}-\frac{7}{5}\right]-\left[\frac{1}{2}-\left(\frac{-2}{7}-\frac{1}{10}\right)\right]\)
c,\(\left(\frac{-1}{2}\right)-\left(\frac{-3}{5}\right)+\left(\frac{-1}{9}\right)+\frac{1}{71}-\left(\frac{-2}{7}\right)+\frac{4}{35}-\frac{7}{8}\)
d,\(\left(3-\frac{1}{4}+\frac{2}{3}\right)-\left(5-\frac{1}{3}-\frac{6}{5}\right)-\left(6-\frac{7}{4}+\frac{3}{2}\right)\)
e,\(\left(\frac{1}{2}-\frac{13}{14}\right):\frac{5}{7}-\left(\frac{-2}{21}+\frac{1}{7}\right):\frac{5}{7}\)
g,\(\frac{4}{9}:\left(\frac{-1}{7}\right)+6\frac{5}{9}:\left(\frac{-1}{7}\right)\)
bài5
(x+1) (x-2)<0 (x-2) (x+\(\frac{2}{3}\))>0
\(\frac{3}{7}-x=\frac{1}{4}-\left(\frac{-3}{5}\right)\)
giúp mình với làm ơn
a,\(\frac{2}{3}-4.\left(\frac{1}{2}+\frac{3}{4}\right)\)
b,\(\left(\frac{-1}{3}+\frac{5}{6}\right).11-7\)
c,\(\left(\frac{-5}{9}\right).\frac{3}{11}+\left(\frac{-13}{18}\right).\frac{3}{11}\)
d,\(\left(\frac{-2}{3}\right).\frac{3}{11}+\left(\frac{-13}{18}\right).\frac{3}{11}\)
giúp mình với làm ơn
Tìm x
\(1.\left(x+0,7\right)^3=-27\)
\(2.\left(2x-1\right)^{10}=49^5\)
\(3.\left(\frac{2}{3}x-\frac{1}{3}\right)^5=\frac{1}{243}\)
\(4.\left(\frac{2}{5}-3x\right)^2=\frac{9}{25}\)
CÁC BẠN GIÚP MÌNH VỚI !!!!!
bài 3: giúp mình với làm ơn
a, 1,25 . left[-3frac{3}{8}right] b, frac{-9}{34}.frac{17}{4}
c, frac{-20}{41}.frac{-4}{5} d, frac{-6}{7}.frac{21}{2}
bài 4:
a, frac{-5}{2}.frac{3}{4} b,4frac{1}{5}:left[-2frac{4}{5}right]
c,1,8:left[frac{-3}{4}right] d,frac{17}{15}:frac{4}{3}
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bài 3: giúp mình với làm ơn
a, 1,25 . \(\left[-3\frac{3}{8}\right]\) b, \(\frac{-9}{34}.\frac{17}{4}\)
c, \(\frac{-20}{41}.\frac{-4}{5}\) d, \(\frac{-6}{7}.\frac{21}{2}\)
bài 4:
a, \(\frac{-5}{2}.\frac{3}{4}\) b,\(4\frac{1}{5}:\left[-2\frac{4}{5}\right]\)
c,\(1,8:\left[\frac{-3}{4}\right]\) d,\(\frac{17}{15}:\frac{4}{3}\)