Fill in the blanks: 11. Every proper rational fraction can be expressed as a sum of . fractions. 12. To each linear factor ax+b occurring once in the denominator of a proper rational fraction, there corresponds a partial fraction of the form A ax+b where A is a constant to the determined. 13. _ In case of the denominator of a proper rational fraction. 14. In case of Distinct Quadratic Factors, to each once in the denominator of a proper rational fraction, there corresponds a simple partial Linear Factors, to each linear factors ax+b occurring n times in ...... quadratic factor occurring fraction of the form Ax+ B 9x + bx+c where A and b are constants to be determined. 15. In case of Repeated Quadratic Factors, to each irreducible quadratic factor, occurring n times in the denominator of a proper rational fraction, there corresponds a of n partial fractions.