A natural number when increased by 12, equals 160 times its reciprocal...
**Problem Analysis**
Let's assume the natural number as "x". According to the problem statement, when this number is increased by 12, it equals 160 times its reciprocal. Mathematically, we can represent this as:
x + 12 = 160 * (1/x)
To find the value of "x", we need to solve this equation.
**Solving the Equation**
We can start by simplifying the equation:
x + 12 = 160/x
Multiplying both sides of the equation by "x" to eliminate the denominator:
x(x + 12) = 160
Expanding the left side of the equation:
x^2 + 12x = 160
Rearranging the equation to obtain a quadratic form:
x^2 + 12x - 160 = 0
**Factoring the Quadratic Equation**
To solve the quadratic equation, we can factor it. Let's find two numbers whose product is -160 and whose sum is 12. After factoring, we get:
(x + 20)(x - 8) = 0
Setting each factor equal to zero and solving for "x":
x + 20 = 0 or x - 8 = 0
x = -20 or x = 8
**Finding the Valid Solution**
Since we are dealing with a natural number, we can discard the negative solution (-20) as it is not a valid solution. Therefore, the only valid solution is x = 8.
Hence, the natural number is 8.
A natural number when increased by 12, equals 160 times its reciprocal...
Let the natural number be 'x'.
The number increased by 12=x+12.
The reciprocal of the number=1/x.
Equation is,
x+12=160×1/x.
x+12=160/x
x(x+12)=160
x^2+12x=160
x^2+12x-160=0
x^2+20x-8x-160=0
x(x+20)-8(x+20)=0
(x-8) (x+20)
x-8=0 x+20=0
x=8. x=-20.
Since 'x' is a natural number,
The required number=x=8.
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