Ta có:
\(\left(-16\right)^{11}=-16^{11}=-\left(2^4\right)^{11}=-2^{4\cdot11}=-2^{44}\)
\(\left(-32\right)^9=-32^9=-\left(2^5\right)^9=-2^{5\cdot9}=-2^{45}\)
Mà: \(44< 45\)
\(\Rightarrow2^{44}< 2^{45}\)
\(\Rightarrow-2^{44}>-2^{45}\)
Ta có:
\(\left(-16\right)^{11}=-16^{11}=-\left(2^4\right)^{11}=-2^{4\cdot11}=-2^{44}\)
\(\left(-32\right)^9=-32^9=-\left(2^5\right)^9=-2^{5\cdot9}=-2^{45}\)
Mà: \(44< 45\)
\(\Rightarrow2^{44}< 2^{45}\)
\(\Rightarrow-2^{44}>-2^{45}\)
\(B=\left(1-\dfrac{1}{4}\right)\left(1-\dfrac{1}{9}\right)\left(1-\dfrac{1}{16}\right)....\left(1-\dfrac{1}{81}\right)\left(1-\dfrac{1}{100}\right)\)
So sánh B với \(\dfrac{11}{21}\)
So sánh:
a)\(\left(-32\right)^9\)và \(\left(-16\right)^{13}\)
b)\(\left(\frac{-1}{16}\right)^{100}\)và\(\left(\frac{-1}{2}\right)^{500}\)
So Sánh M=\(\left(1-\frac{1}{4}\right)\left(1-\frac{1}{9}\right)\left(1-\frac{1}{16}\right)...\left(1-\frac{1}{100}\right)\) với \(\frac{11}{19}\)
Cho B=\(\left(1-\frac{1}{4}\right).\left(1-\frac{1}{9}\right).\left(1-\frac{1}{16}\right)...\left(1-\frac{1}{81}\right).\left(1-\frac{1}{100}\right)\)
So sánh B với 11/21
Cho A = \(\left(1-\frac{1}{4}\right)\left(1-\frac{1}{9}\right)\left(1-\frac{1}{16}\right)\left(1-\frac{1}{81}\right)\left(1-\frac{1}{100}\right)\)So sánh A với \(\frac{11}{19}\)
Bài 1 : cho 2 biểu thức
\(A=\left(1-\frac{1}{2}\right)\left(1-\frac{1}{3}\right)...\left(1-\frac{1}{19}\right)\left(1-\frac{1}{20}\right)\)
\(B=\left(1-\frac{1}{4}\right)\left(1-\frac{1}{9}\right)\left(1-\frac{1}{16}\right)...\left(1-\frac{1}{81}\right)\left(1-\frac{1}{100}\right)\)
So sánh A với \(\frac{1}{21}\)
So sánh B với \(\frac{11}{21}\)
So sánh
a,\(\left(-32\right)\)\(^9\)và \(\left(-16\right)\)\(^{13}\)
b,\(\left(-5\right)\)\(^{30}\)và \(\left(-3\right)\)\(^{50}\)
c,\(\left(-32\right)\)\(^9\)và \(\left(-18\right)\)\(^{13}\)
d, \(\left(\frac{-1}{16}\right)\)và \(\left(\frac{-1}{2}\right)\)
So sánh các lũy thừa sau :
1) \(\left(-2\right)^{240}\)và \(\left(-3\right)^{160}\)
2) \(\left(-84\right)^{11}\)và \(\left(-9\right)^{21}\)
3)\(\left(\frac{-1}{8}\right)^7\)và \(\left(\frac{-1}{16}\right)^5\)
Cho \(A=\left(\dfrac{1}{4}-1\right).\left(\dfrac{1}{9}-1\right)...\left(\dfrac{1}{100}-1\right)\)
So sánh \(A\) với \(\dfrac{-11}{21}\)
Giải chi tiết dùm mik nha. Thankss