If x=2^1/3+2^2/3 , prove that x^3-6x=6
Attachments:
Answers
Answered by
121
Heya !!!
here is your answer !!!
look this attachment ;-
hope it helps !!
thanks !!!
here is your answer !!!
look this attachment ;-
hope it helps !!
thanks !!!
Attachments:
pranay94:
Thx bro
Answered by
35
HELLO DEAR,
GIVEN that:-
9^(x + 2) = 240 + 9^x
⇒9^x × 9² = 240 + 9^x
⇒9^x × 81 - 9^x = 240
⇒9^x(81 - 1) = 240
⇒9^x = 240/80
⇒9^x = 3
⇒3^2x = 3¹
⇒2x = 1
⇒x = 1/2
Now,
(8 × x)^x
⇒(8 × 1/2)½
⇒ (4)½
⇒(2²)½
⇒ (2)^2 × 1/2
⇒ 2
I HOPE ITS HELP YOU DEAR,
THANKS
GIVEN that:-
9^(x + 2) = 240 + 9^x
⇒9^x × 9² = 240 + 9^x
⇒9^x × 81 - 9^x = 240
⇒9^x(81 - 1) = 240
⇒9^x = 240/80
⇒9^x = 3
⇒3^2x = 3¹
⇒2x = 1
⇒x = 1/2
Now,
(8 × x)^x
⇒(8 × 1/2)½
⇒ (4)½
⇒(2²)½
⇒ (2)^2 × 1/2
⇒ 2
I HOPE ITS HELP YOU DEAR,
THANKS
Similar questions