Math

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Across
  1. 2. 1+2+4+8..., n=6
  2. 3. 35,31,27,233,...,-21
  3. 8. 768,3,072,12,288
  4. 9. -2-6-18-54...,n=9
  5. 10. 1-5+25-125...,n=7
  6. 11. 2,10,50,250
  7. 13. 1+4+7+10
  8. 15. 3,6,12,24,...,1,536
  9. 16. 4x+1(x+2)=7
  10. 17. 3,5,7,9
Down
  1. 1. A=10,000(1+.05)^20
  2. 4. A=200,000(1-0.5)^4(12)
  3. 5. 1/10-1/12=1/x
  4. 6. A=8,000(.9)^5
  5. 7. a1=4,an=8,748,r=3
  6. 12. A=30,000(1-.2)^5
  7. 14. 4x3=x^2