Question

A natural number, when increased by 12, equals 160 times its reciprocal. Find the sum of number and its reciprocal.

Q2 If x=-1/2, is a solution of the quadratic equation, find the value of k.​​

Answer 1

Question - 1 :-

Let the natural number = c

If the number increased by 12 = x + 12

Reciprocal of the number = 1/x

According to the problem given,

x + 12 = 160 times of reciprocal of x

x + 12 = 160/ x

x( x + 12 ) = 160

x^2 + 12x - 160 = 0

x^2 + 20x - 8x - 160 = 0

x( x + 20) - 8( x + 20)= 0

( x + 20 ) ( x - 8 ) = 0

x + 20 = 0 or x - 8 = 0

x = - 20 or x = 8

But x is a natural number.

Therefore,

Required number = x = 8

Question -2 :-

plz give the equation

you have not given equation

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Answer 2

Explanation:

your answer is in the attachment