so sanh
a, A= 19/41 + 23/53 + 29/61
B= 21/41 + 23/49 + 33/65
b,A= 12/ 14^11 + 23/14^12
B=12/14^12 + 23/ 14^11
so sanh
a, A= 19/41 + 23/53 + 29/61
B= 21/41 + 23/49 + 33/65
b,A= 12/ 14^11 + 23/14^12
B=12/14^12 + 23/ 14^11
so sanh
a, A= 19/41 + 23/53 + 29/61
B= 21/41 + 23/49 + 33/65
b,A= 12/ 14^11 + 23/14^12
B=12/14^12 + 23/ 14^11
So sánh các biểu thức A và B biết :
a/ A=19/41+23/53+29/61 B=21/41+23/49+33/65
b/ A=12/1411+23/1412 B=12/1412+23/1411
c/ A=1920+5/1920-8 B=1921+6/1921-7
So sánh các biểu thức A và B, biết:
a/ A = \(\frac{19}{41}+\frac{23}{53}+\frac{29}{61}\) B = \(\frac{21}{41}+\frac{23}{49}+\frac{33}{65}\)
b/ A = \(\frac{12}{14^{11}}+\frac{23}{14^{12}}\) B = \(\frac{12}{14^{12}}+\frac{23}{14^{11}}\)
c/ A = \(\frac{19^{20}+5}{19^{20}-8}\) B = \(\frac{19^{21}+6}{19^{21}-7}\)
sao ban ghi duoc dau gach gang duoi phan so vay chi cho minh nha
Cau a va b dat thua so chung
Cau c phan h thanh tong cua 1 va 1 phan so
tích mình đi
làm ơn
rùi mình
tích lại
thanks
So sánh các biểu thức A và B, biết:
a/ A = \(\frac{19}{41}+\frac{23}{53}+\frac{29}{61}\) B = \(\frac{21}{41}+\frac{23}{49}+\frac{33}{65}\)
b/ A = \(\frac{12}{14^{11}}+\frac{23}{14^{12}}\) B = \(\frac{12}{14^{12}}+\frac{23}{14^{11}}\)
c/ A = \(\frac{19^{20}+5}{19^{20}-8}\) B = \(\frac{19^{21}+6}{19^{21}-7}\)
\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50=?
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50=1275
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50.
Có ai rảnh đâu mà đi ngồi cộng ngần đấy số ra.
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50+51+52+53+54+56+57+58+59+60+61+62+63+64+65+66+67+68+69+70=?