When a positive number is decreased by 4 it is equal to 21 times the reciprocal of the number find the number?

1 anos atrás

Comentários: 0

Visualizações: 128

DownloadApp

Home » Aptitude » Number System » Question

A positive number when decreased by 4, is equal to 21 times the reciprocal of the number, the number ?

Let the number be x,Then x - 4 = 21/x

⇒ x2 - 4x - 21 = 0

⇒ x2 - 7x + 3x - 21 = 0 ⇒ x(x - 7) + 3(x - 7) = 0 ⇒ (x - 7) (x + 3) = 0

∴ x = 7 (Neglecting = -3)

Your browser is no longer supported. Update it to get the best YouTube experience and our latest features. Learn more

Remind me later

Postagens relacionadas

Find the greatest number which when divides 564 and 467 leaves the remainder as 4 and 7 respectively

Find the greatest number which when divides 564 and 467 leaves the remainder as 4 and 7 respectively

What organization within the Navy is responsible for maintaining the US Navy uniform regulations?

What organization within the Navy is responsible for maintaining the US Navy uniform regulations?

What agreement did britain and the united states make in the treaty of 1818?

What agreement did britain and the united states make in the treaty of 1818?

Why is the community mental health Act of 1963 still relevant today

Why is the community mental health Act of 1963 still relevant today

When was the black box invented

When was the black box invented

When setting up passwords to protect digital records which option is an action you should take

When setting up passwords to protect digital records which option is an action you should take

In what ratio does the X − axis divide the line segment joining the points − 4 − 6 and − 1 7 also find the coordinates of the point of division?

In what ratio does the X − axis divide the line segment joining the points − 4 − 6 and − 1 7 also find the coordinates of the point of division?

When both the demand and supply curves shift to indicate an increase in demand and supply in the same proportion?

When both the demand and supply curves shift to indicate an increase in demand and supply in the same proportion?

O uso da língua é vinculado aos campos da atividade humana bakthin segundo a qual a língua é

O uso da língua é vinculado aos campos da atividade humana bakthin segundo a qual a língua é

What county is kerman ca in

What county is kerman ca in