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a,4^16
60^15
x^5050
tich cho minh
pheaeeeeeeeeeeeeeeeeeeeeeeeeeeee
Bài 1 :
a/ \(a^3.a^9=a^{3+9}=a^{12}\)
b/\(\left(a^5\right)^7=a^{5.7}=a^{35}\)
c/ \(\left(a^6\right).4.a^{12}=a^{24}.a^{12}.4=a^{24+12}.4=a^{36}.4\)
d/ \(\left(2^3\right)^5.\left(2^3\right)^3=2^{15}.2^9=2^{15+9}=2^{24}\)
e/ \(5^6:5^3+3^3.3^2\)
\(=5^3+3^5=125+243=368\)
i/ \(4.5^2-2.3^2\)
\(=2^2.5^2-2.3^2\)
\(=2^2.25-2^2.14\)
\(=2^2.\left(25-14\right)\)
\(=2^2.11\)
\(=4.11=44\)
a)= 24x5^5+5^5=5^5(24+1)=5^5x5^2=5^7
b)=21x3^8+9x3^8+51x3^8=3^8(21+9+51)=3^8x3^4=3^12
\(\left(\frac{3}{7}\right)^5.\left(\frac{7}{3}\right)^{-1}.\left(\frac{5}{6}\right)^6.\left(\frac{343}{625}\right)^{-2}\)
\(=\left(\frac{3}{7}\right)^5.\left(\frac{3}{7}\right).\left(\frac{5}{2.3}\right)^6.\left(\frac{5^4}{7^3}\right)^2\)
\(=\frac{3^5}{7^5}.\frac{3}{7}.\frac{5^6}{2^6.3^6}.\frac{5^8}{7^6}=\frac{1}{2^6}.\frac{3^6}{3^6}.\frac{5^{14}}{1}.\frac{1}{7^{12}}=\frac{5^{14}}{2^6.7^{12}}\)
Nó đâu có phải là số nguyên đâu
3/7 x 5/6 +5/6 x3/7
= (3/7x5/6) + (5/6x3/7)
= 15/42 + 15/42 = 30/42 = 5/7
512 x 7-511 x 10=511 x (5x7-10)
= 511 x 25
= 511 x 52
= 513
a) 102 : 108 . 117
k biết làm :
164 : 43
= 48 : 43
= 45
39 : 38 . 32 . 15
= 3 . 32
= 33
51 . 516 : 514 . 50
= 517 : 514 . 1
= 53
1143 : 1142 . 112
= 11 . 112
= 113
125 . 124 : 127 . 12
= 129 : 127 . 12
= 122 . 12
= 123
a)33 . 92
= 33 . 34
=33+4
=37
b) 512.7-511.10
= 512.7 - 512.2
= 512.(7-2)
= 512.5
=513
c) x1.x2.x3...x100
= x(100+1).100:2
= x5050
33 . 92 = 33 . (3 . 3)2 = 33 . 32 . 32 = 37