let 1+2+4+8+...... =s s= 1+2(1+2+4+8+........) s=1+2s s=-1 but sum of infinite terms cannot be -1 so, what's the answer
12 blackdrago98's answer: If the question is: "What is the answer to '2 plus 2 plus 4'?" then it is 8. If the question is: "What is the answer: 2(2+2+4)?"
s = -2 -4r
-2=4r+s s=-4r-2 or s=-(4r+2)
s = 20
4s^2 + s - 14 = (4s - 7)(s + 2)
The solutions are: s = -3/2 and s = -3/2 they have equal roots
2 or window
Barium sulfide is BaS.
3
yes
k + S-2