If a^2 + 1/a^2 = 18 ,find a + 1/a
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Hi Mate!!!
{ a² + 1 / a² } = { a + 1 / a }² - 2
18 = { a + 1 / a }² - 2
20 = { a + 1 / a } ²
{ a + 1 / a } = + √ ( 20)
or
{ a + 1 / a } = - √(20)
Have a great future ahead
{ a² + 1 / a² } = { a + 1 / a }² - 2
18 = { a + 1 / a }² - 2
20 = { a + 1 / a } ²
{ a + 1 / a } = + √ ( 20)
or
{ a + 1 / a } = - √(20)
Have a great future ahead
Crazyme:
thank you sir
answer is wrong
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