A Treatise on AlgebraHarper & brothers, 1855 - 316 páginas |
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Página 19
... miles , then southward 27 miles , then northward 15 miles , then southward again 22 miles , and we wish to deter- mine the last position of the ship . If we call the northerly motion + , the whole may be expressed algebraically thus : + ...
... miles , then southward 27 miles , then northward 15 miles , then southward again 22 miles , and we wish to deter- mine the last position of the ship . If we call the northerly motion + , the whole may be expressed algebraically thus : + ...
Página 68
... miles distant , two travelers set out at the same time with an intention of meeting . One of them goes 4 miles and the other 5 miles per hour . In how many hours will they meet ? Let x represent the required number of hours . Then 4x ...
... miles distant , two travelers set out at the same time with an intention of meeting . One of them goes 4 miles and the other 5 miles per hour . In how many hours will they meet ? Let x represent the required number of hours . Then 4x ...
Página 69
... miles one body moves , • and no the miles the other body moves , and we shall obviously have mx + nx - a . Hence x = α m + n This is a general formula , comprehending the solution of all problems of this kind . Thus , = 150 ; 90 135 210 ...
... miles one body moves , • and no the miles the other body moves , and we shall obviously have mx + nx - a . Hence x = α m + n This is a general formula , comprehending the solution of all problems of this kind . Thus , = 150 ; 90 135 210 ...
Página 71
... miles per hour , had been gone three hours , when a second train followed at the rate of 25 miles per hour . In what time will the second train overtake the first ? Let the number of hours the second train is in motion , x + 3 = the ...
... miles per hour , had been gone three hours , when a second train followed at the rate of 25 miles per hour . In what time will the second train overtake the first ? Let the number of hours the second train is in motion , x + 3 = the ...
Página 72
... miles per hour , the second train goes 300 miles ; and in 15 hours , at 20 miles per hour , the first train also goes 300 miles ; that is , it is overtaken by the second train . Prob . 20. Two bodies move in the same direction from two ...
... miles per hour , the second train goes 300 miles ; and in 15 hours , at 20 miles per hour , the first train also goes 300 miles ; that is , it is overtaken by the second train . Prob . 20. Two bodies move in the same direction from two ...
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Términos y frases comunes
according to Art algebraic arithmetical progression binomial coefficients common denominator Completing the square continued fraction cube root difference Divide the number dividend divisible dollars equa equation containing EXAMPLES exponent expression extracting the square factors figure Find the square find the values following RULE four quantities fourth power fourth root geometrical progression greater greatest common divisor Hence infinite series last term less letters taken logarithm method miles monomial multiplied negative nth root number of combinations number of permutations number of terms obtain original equation polynomial preceding Prob problem quadratic equations quotient radical quantities radical sign ratio Reduce remainder represent Required the cube Required the fourth Required the number Required the square Required the sum second degree second term simple form square root subtract surd THEOREM three numbers tion tities unity unknown quantity values of x Whence whole number zero
Pasajes populares
Página 229 - Which proves that the square of a number composed of tens and units contains, the square of the tens plus twice the product of the tens by the units, plus the square of the units.
Página 28 - The square of the difference of two quantities is equal to the square of the first minus twice the product of the first by the second, plus the square of the second.
Página 231 - Multiply the divisor, thus increased, by the last figure of the root; subtract the product from the dividend, and to the remainder bring down the next period for a new dividend. 5. Double the whole root already found for a new divisor, and continue the operation as before, until all the periods are brought down.
Página 76 - To divide the number 90 into four such parts, that if the first be increased by 2, the second diminished by 2, the third multiplied...
Página 141 - A vintner draws a certain quantity of wine out of a full vessel that holds 256 gallons ; and then filling the vessel with water, draws off the same quantity of liquor as before, and so on for four draughts, when there were only 81 gallons of pure wine left. How much wine did he draw each time ? 50.
Página 308 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.
Página 13 - Add all the positive coefficients together, and oho all those that are negative ; subtract the least of these results from the greater ; to the difference annex the common letter or letters, and prefix the sign of the greater sum. Thus, instead of 7a— 4a, we may write 3a, since these two expressions obviously have the same value.
Página 196 - Multiply the last term by the ratio, from the product subtract the first term, and divide the remainder by the ratio, less 1 ; the quotient will be the sum of the series required.
Página 334 - The number of deaths in a besieged garrison amounted to 6 daily ; and allowing for this diminution, their stock of provisions was sufficient to last 8 days. But on the evening of the sixth day, 100 men were killed in a sally, and afterwards the mortality increased to 10 daily. Supposing the...
Página 28 - ... the product of the two, plus the square of the second. In the third case, we have (a + b) (a — 6) = a2 — b2. (3) That is, the product of the sum and difference of two quantities is equal to the difference of their squares.