The elements of algebraOliver & Boyd, 1857 - 95 σελίδες |
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Σελίδα 69
... infinite number of terms . The sym- bol being used to denote a quantity infinitely great . Then , since each term after the first is found by multiply- ing the preceding one by r , the series may be written thus : t1 , rt , ret1 ...
... infinite number of terms . The sym- bol being used to denote a quantity infinitely great . Then , since each term after the first is found by multiply- ing the preceding one by r , the series may be written thus : t1 , rt , ret1 ...
Σελίδα 71
... infinite , " becomes = 0 , and therefore the formula Sn rn = t . becomes S 8 = From which it appears that to find the sum of an infinite number of terms of a descending geometrical series , we have only to divide the first term by the ...
... infinite , " becomes = 0 , and therefore the formula Sn rn = t . becomes S 8 = From which it appears that to find the sum of an infinite number of terms of a descending geometrical series , we have only to divide the first term by the ...
Σελίδα 81
... infinite series is such , that if the sum of a large number of terms be taken as the sum of the whole , the error admits of being made less than any quantity that can be assigned , however small , that series is said to be convergent ...
... infinite series is such , that if the sum of a large number of terms be taken as the sum of the whole , the error admits of being made less than any quantity that can be assigned , however small , that series is said to be convergent ...
Σελίδα 82
... infinite in the result , the sum = 1 . Ex . 2. Let it be required to sum the infinite series , 1 3 5 + + + , & c . 2. 4.6 4.6.8 6.8.10 1 3 5 Assume A = + + 2 6.8 + & c . ... transposing , A — } = + + 3 4.6 5 7 6.8 8.10 + , & c . 5 or ...
... infinite in the result , the sum = 1 . Ex . 2. Let it be required to sum the infinite series , 1 3 5 + + + , & c . 2. 4.6 4.6.8 6.8.10 1 3 5 Assume A = + + 2 6.8 + & c . ... transposing , A — } = + + 3 4.6 5 7 6.8 8.10 + , & c . 5 or ...
Σελίδα 83
... infinite number of terms of each of the following series : 1 1 1 ( 1. ) 1.2+ 2.3+ . + , & c . Ans . Sn = 3 . 4 1 1 ( 2. ) 1.2.3+ 2.3.4 + , & c . . $ n = § 1.2.3 1.2.3 ( 3. ) 1.2.3 + 2.3.4 + , & c . . §n = 1 1 ( 4. ) 1. 2. 3. 4 + 2 .
... infinite number of terms of each of the following series : 1 1 1 ( 1. ) 1.2+ 2.3+ . + , & c . Ans . Sn = 3 . 4 1 1 ( 2. ) 1.2.3+ 2.3.4 + , & c . . $ n = § 1.2.3 1.2.3 ( 3. ) 1.2.3 + 2.3.4 + , & c . . §n = 1 1 ( 4. ) 1. 2. 3. 4 + 2 .
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
a+b+c a²+2ab+b² annex arithmetical series ax² binomial binomial theorem coefficient common denominator common difference common ratio compound quantity consecutive numbers cube root deno denote the number Divide divisor double equal equation contains EXERCISES expressed Extract the square factor Find a number find the Greatest Find the number Find the sum following fractions following quantities geometric means given quantity Greatest Common Measure Hence Least Common Multiple letters miles per hour mixed quantities multiplied negative number of balls number of combinations number of permutations number of terms numbers whose sum numerator and denominator Prove QUADRATIC EQUATIONS quotient remainder shillings side sign changed simple quantity square root subtracting surd t₁ things taken third total number transposing travelled unknown quantity ах
Δημοφιλή αποσπάσματα
Σελίδα 61 - To divide a given straight line into two parts, so that the rectangle contained by the -whole, and one of the parts, may be equal to the square of the other part.
Σελίδα 88 - The fore-wheel of a carriage makes six revolutions more than the hind-wheel in going 120 yards ; but if the circumference of each wheel be increased one yard, it will make only four revolutions more than the hind-wheel in going the same distance.
Σελίδα 60 - Divide the number 24 into two such parts, that their product shall be to the sum of their squares, as 3 to 10.
Σελίδα 16 - If the numerator and denominator of a fraction be both multiplied or both divided by the same number, the value of the fraction is not altered.
Σελίδα 44 - Divide the first term of the remainder by three times the square of the first term of the root, and write the result as the next term of the root.
Σελίδα 9 - A power of a quantity is divided by any other power of the same quantity by subtracting the index of the divisor from that of the dividend, the quotient being that power of the quantity whose index is the remainder so obtained.
Σελίδα 66 - From the preceding, it appears, that the sum of the extremes is equal to the sum of any other two terms equally distant from the extremes.
Σελίδα 41 - ... be divided by the number of terms to that place, it will give the coefficient of the term next following.
Σελίδα 44 - Take the root of the first term, for the first term of the required root...
Σελίδα 40 - A man was hired 50 days on these conditions. — that, for every day he worked, he should receive $ '75, and, for every day he was idle, he should forfeit $ '25 ; at the expiration of the time, he received $ 27'50 ; how many days did he work...