b1=1, b6=243
b6=b1 * q^5
b6= 1 * q^5
b6= q^5
q^5 = 243
q = 3
b2 = 3; b3 = 9; b4 = 27; b5 = 81
S5 = 1 + 3 + 9 + 27 + 81 = 121
ответ. 121.
b1=1, b6=243
b6=b1 * q^5
b6= 1 * q^5
b6= q^5
q^5 = 243
q = 3
b2 = 3; b3 = 9; b4 = 27; b5 = 81
S5 = 1 + 3 + 9 + 27 + 81 = 121
ответ. 121.