B=70.\(\left(\frac{13.10101}{56.10101}+\frac{13.10101}{72.10101}+\frac{13.10101}{90.10101}\right)\)
B=70.\(\left(\frac{13}{56}+\frac{13}{72}+\frac{13}{90}\right)\)
B=70.\(\frac{39}{70}\)=39
ks nha
B= 70.( 131313/565656 + 131313/727272 + 131313/909090)
B = 70 * ( 13/56 + 13/72 + 13/90)
B = 70* 0,1464....
B= 10,254050...
B=70.\left(\frac{13.10101}{56.10101}+\frac{13.10101}{72.10101}+\frac{13.10101}{90.10101}\right)(
56.10101
13.10101
+
72.10101
13.10101
+
90.10101
13.10101
)
B=70.\left(\frac{13}{56}+\frac{13}{72}+\frac{13}{90}\right)(
56
13
+
72
13
+
90
13
)
B=70.\frac{39}{70}
70
39
=39
B=70.\left(\frac{13.10101}{56.10101}+\frac{13.10101}{72.10101}+\frac{13.10101}{90.10101}\right)(
56.10101
13.10101
+
72.10101
13.10101
+
90.10101
13.10101
)
B=70.\left(\frac{13}{56}+\frac{13}{72}+\frac{13}{90}\right)(
56
13
+
72
13
+
90
13
)
B=70.\frac{39}{70}
70
39
=39
