25

10

104

TL

5x5=25

5x2=10

55+49=104

5 x 5 = 25

5 x 2 = 10

55 + 49 = 104

30/41                                   

bằng 30/41

cach lam, ket qua sai

5x5 - 5x5 = 25 - 25 = 0

              Đáp số : 0 nhé bạn

zero nak! ~ mk đg nhớ 1 ng......ai đồng cảm thì kết bạn nhe!

0 nhé bạn

5 + 5 x 5 - 5 + 5 x 5 : 5 

= 5 + 25 - 5 + 5

= 30

= 5 + 25 - 5 + 25 : 5

= 5 + 25 - 5 + 5

= 30 - 5 + 5

= 25 + 5

= 30

5+5*5-5+5*5:5

=5+25-5+5

=30

\(M\left(x\right)=10x^5-8x^4+4x^3+8x^2+2019\)
Bậc 5

bâc là 5

\(\text{Bậc là:5}\)

1.

\(A=\frac{1.2}{2.2}.\frac{2.3}{3.3}.\frac{3.4}{4.4}......\frac{2012.2013}{2013.2013}\)

\(A=\frac{1}{2}.\frac{2}{3}.\frac{3}{4}.........\frac{2012}{2013}\)

\(A=\frac{1.2.3.4.....2012}{2.3.4.5......2013}\)

\(A=\frac{1}{2013}\)

\(B=\frac{2012.2013-2012.2012}{2012.2011+2012.2}\)

\(B=\frac{2012\left(2013-2012\right)}{2012\left(2011+2\right)}\)

\(B=\frac{2013-2012}{2011+2}\)

\(B=\frac{1}{2013}\)

\(Vì:\frac{ 1}{2013}=\frac{1}{2013}\)

\(\Rightarrow\frac{1.2}{2.2}.\frac{2.3}{3.3}.\frac{3.4}{4.4}......\frac{2012.2013}{2013.2013}=\frac{2012.2013-2012.2012}{2012.2011+2012.2}\)

\(Hay: A=B\)

\(A=\frac{1\times2}{2\times2}\times\frac{2\times3}{3\times3}\times\frac{3\times4}{4\times4}\times\frac{4\times5}{5\times5}\times...\times\frac{2012\times2013}{2013\times2013}\)

\(\Rightarrow A=\frac{1}{2}\times\frac{2}{3}\times\frac{3}{4}\times\frac{4}{5}\times...\times\frac{2012}{2013}\)

\(\Rightarrow A=\frac{1\times2\times3\times4\times...\times2012}{2\times3\times4\times5\times...\times2013}\)

\(\Rightarrow A=\frac{1}{2013}\)

\(B=\frac{2012\times2013-2012\times2012}{2012\times2011+2012\times2}\)

\(\Rightarrow B=\frac{2012\times\left(2013-2012\right)}{2012\times\left(2011+2\right)}\)

\(\Rightarrow B=\frac{2012\times1}{2012\times2013}\)

\(\Rightarrow B=\frac{1}{2013}\)

\(\frac{55}{16.21}\)chứ nhỉ.

A=\(\frac{55}{11.16}+\frac{55}{16.21}+\frac{55}{21.26}+\frac{55}{26.31}+\frac{55}{31.36}+\frac{55}{36.41}\)

A= 11.\(\left(\frac{1}{11}-\frac{1}{16}+\frac{1}{16}-\frac{1}{21}+\frac{1}{21}-\frac{1}{26}+....+\frac{1}{36}-\frac{1}{41}\right)\)

A= 11\(\left(\frac{1}{11}-\frac{1}{41}\right)\)

A= 11.\(\frac{30}{451}\)

A= \(\frac{30}{41}\)

\(\frac{30}{41}\)

\(A=\frac{55}{11.16}+\frac{55}{16.21}+\frac{55}{21.26}+....+\frac{55}{36.41}\)

    \(=11.\left(\frac{5}{11.16}+\frac{5}{16.21}+\frac{5}{21.26}+.....+\frac{5}{36.41}\right)\)

     \(=11.\left(\frac{1}{11}-\frac{1}{16}+\frac{1}{16}-\frac{1}{21}+....+\frac{1}{36}-\frac{1}{41}\right)\)

      \(=11.\left(\frac{1}{11}-\frac{1}{41}\right)\)

       \(=1-\frac{11}{41}\)

       \(=\frac{30}{41}\)

So sánh 22⁵⁵ và 55²²

22⁵⁵=(2.11)^5.11=(2⁵.11⁵)¹¹=(32.11⁵)¹¹

55²²=(5.11)^2.11=(5².11²)¹¹=(25.11²)¹¹

Vì (32.11⁵)¹¹ > (25.11²)¹¹

Nên 22⁵⁵ > 55²²

nếu đúng thì tick cho mình nha các bạn