Page images

3х Ex. 2. Reduce 5a- to an improper fraction.

7 Here 5a Xy=5ay; to this add the numerator with its proper sign, viz. -- 3x ; and we shall have 5ay--3x. Hence, 5ay-3x

is the fraction required.

as-ya Ex. 3. Reduce x2

to an improper fraction.

Here, xo xxx ; adding the numerator qi-yo with its proper sign : It is to be recollected that the

al-y sign affixed to the fraction

means that the whole of that fraction is to be subtracted, and consequently that the sign of each term of the numerator must be changed, when it is combined with x3,

23-aa+ya hence the improper fraction required is

-a +ya Or, as

; (Art. 67),

az--Y the proposed mixed quantity 22.

y-a? put under the form x + which is reduced as Ex: 1. Thus, a Xx+y2-a2 =33+ya-a;


23 +ya hence, a to

[ocr errors]
[ocr errors]


[ocr errors]
[ocr errors]

may be

[ocr errors]


[ocr errors]


[ocr errors]
[ocr errors]
[ocr errors]
[ocr errors]
[ocr errors]

302-a+7 Ex. 4. Reduce 5a" +

to an improper

2ar fraction.

Here, 5a2 X 2ax=10aox; adding the numerator 3x?-a+7 to this, and we have 10a3x + 3x? -a+7.

10a3+3r---a+7 Hence,

is the fraction required. 2ax

3ab tc Ex. 5. Reduce 4x2

to an improper

2ac fraction.

Here, 4x2 X 2ac=Sacr, in adding the numerator with its proper sign; the sign --prefixed to the

3ab tc fraction signifies that it is to be taken nega

2ac tively, or that the whole of that fraction is to be subtracted; and consequently that the sign of each term of the numerator must be changed when it is

8acr?---3ab combined with Sacra; hence,

is 2ac 3abtc

-3ab--f the fraction required. Or, as

=t 2ac

2ac - 3ab

(Art. 67); hence the reason of chang2ac ing the signs of the numerator is evident.

a -802 Ex. 6. Reduce x

to an improper frac


[ocr errors]
[ocr errors][ocr errors][merged small][merged small][merged small][merged small]
[merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][ocr errors][ocr errors][merged small][merged small]
[ocr errors]

4X-9 Ex. 10. Reduce 302

to an improper 7α

21 ax2 - 4x +9 fraction.


-5 Ex. 11, Reduce 5x

to an improper 3

13x +5 fraction.



4x4 Ex. 12. Reduce 1+2x

to an improper 5x

x + 10x +4 fraction.



[ocr errors]


To reduce an improper fraction to a whole or mixed



149. Observe which terms of the numeralor are divisible by the denominator without a remainder, the quotient will give the integral part; and put the remaining terms of the numerator, if any, over the denominator for the fractional part; then the two joined together with the proper sign between them, will give the mixed quantity required.

to a mixed quan

3 + 2ax +6 Ex. 1. Reduce

2 tity.

2 + 2axa Here,

=x+ 2a is the integral part, 202 b and

is the fractional part; 3

6 therefore x+2at is the mixed quantity required.


208 + x*y* +y8 Ex. 2. Reduce

to a whole quan

4 ** + xy +y* lity. Dividend.

Divisor. To+cos^+g* c+cos^ +° xo + Rya txoy4

Quotient -xoy2 + y2

24-xoya +y4 хву? ху* —x°у°



[subsumed][ocr errors][subsumed]

Here the operation is performed according to the rule (Art. 93), and the quotient 2*--raya +y4 is the whole quantity required.





Ex. 3. Reduce

to a mixed quantity.

262 Here, =a is the integral, and the frac

262 tional part; therefore ac

is the mixed quantity required.

[ocr errors]
[ocr errors]

22-a? + b Ex. 4. Reduce

to a mixed quantity. *ta b

[required. xta)x2-a2 +b(xmat the mixed quantity

xta xa tax

ax -a?


to Here the remainder b is placed over the denominator +a, and annexed to the quotient as in (Art. 89).

3a'b? +6ab- 2x + 2c Ex. 5. Reduce

to a mixed

3ab quantity.

3a2b2 +6ab Here

=ab+2 is the integral part, 3ab - 2x + bc 2x-2c 20-2x and


(Art. 128), 3ab


3ab is the fractional part; 2-2c

20-23 .. ab +2

or ab +-2+ is the mixed 3ab

3ab quantity required.

2iax242 +9 Ex. 6. Reduce

to a mixed quan

429 tity.

Ans. 3x

Ex. 7. Reduce 8xy-- 30x -- 66

toa mixed quan

3ax t-66 tily

Ans. 2y




« PreviousContinue »