Giúp mình vs ,mai cần gấp:
A=\(\frac{25^{28}+25^{24}+25^{20}+...+25^4+25^2+1}{25^{30}+25^{28}+25^{26}+...+25^2+1}\)
Bạn nào trả lời nhanh mình sẽ cho 1 tick,
nhanh các bạn nhé!
Tính
\(A=\frac{25^{28}+25^{24}+25^{20}+...+25^4+1}{25^{30}+25^{28}+25^{26}+...+25^2+1}\)
\(A=\frac{25^{28}+25^{24}+25^{20}+...+25^4+1}{25^{30}+25^{28}+25^{26}+...+25^2+1}\)
Rút gọn \(\frac{25^{28}+25^{24}+25^{20}+...+25^4+1}{25^{30}+25^{28}+25^{26}+...+25^4+25^2+1}\)
25^28+25^24+25^20+...+25^4+1/25^30+25^28+25^26+...+25^2+1
1.rút gọn phân số
\(\frac{25^{28}+25^{24}+25^{20}+...+25^4+1}{25^{30}+25^{28}+25^{26}+...25^2+1}\)
Rút gọn phân số : \(A=\frac{25^{28}+25^{24}+25^{20}+....+25^4+1}{25^{30}+25^{28}+25^{26}+....+25^2+1}\)
\(A=\frac{25^{28}+25^{24}+25^{20}+...+25^4+1}{25^{30}+25^{28}+25^{26}+...+25^2+1}=25^{30}+25^{26}+25^{22}+25^{18}+25^{14}+25^{10}+25^6+25^2\)
\(C=\frac{25^{28}+25^{24}+...+25^4+25^0}{25^{30}+25^{28}+...+25^2+25^0}\)
AI GIẢI ĐC TICK 10 LIKE
MÌNH CẦN GẤP LẮM TỐI MÌNH HỌC RỒI
C = \(\frac{25^{28}+25^{24}+...+25^4+25^0}{25^{30}+25^{28}+...+25^2+25^0}\)
= \(\frac{25^{28}+25^{24}+...+25^2+25^0}{\left(25^{30}+25^{26}+...+25^2\right)+\left(25^{28}+25^{24}+...+25^0\right)}\)
= \(\frac{25^{28}+25^{24}+...+25^0}{25^2\left(25^{28}+25^{24}+...+1\right)+\left(25^{28}+25^{24}+...+1\right)}\)
= \(\frac{25^{28}+25^{24}+...+1}{\left(25^2+1\right)\left(25^{28}+25^{24}+...+1\right)}=\frac{1}{626}\)
Cho 10 ****
Tính A=2528 +2524+2520+...+254+1/2530 +2528+2526+...+252+1
các bạn ơi trả lời nhanh câu này . Mình mới làm 1 nửa
25 x 5 x 4 x 125x 20 x 8
25 x 5 x 4 x 25 x 5 x 20 x 8
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thừa các bạn bỏ nhé!
\(25.5.4.125.20.8\)
\(=\left(25.4\right).\left(5.20\right).\left(125.8\right)\)
\(=100.100.1000\)
\(=10000000\)
25*(5+5)*4*20*8
=250*20+4+8
= 5000*12
=60000