Question

If x^-2 = 64, then x ^- 1/3 +x^8 =?
(a) 2
(b) 3/2​

Answer 1

Answer:

i think the answer is 2.00000006

therefore 2 is correct

Step-by-step explanation:

x^(-2)=(1/x)^(2)=64

x^2=1/64

x=1/8

x^(-1/3)+x^8

(1/x)^(1/3)+x^8

substitute x=1/8

(1/(1/8))^(1/3)+(1/8)^8

8^(1/3)+(1/16777216)

2+0.00000006

2.00000006

Answer 2

HEYA!!

${x}^{ - 2} = 64$

${x}^{ - 2} = {8}^{2}$

${x}^{ - 2} = (\frac{1}{8})^{ - 2}$

$x = \frac{1}{8}$

now according to question

$( {x})^{ \frac{ - 1}{3} } +( {x})^{8}$

on putting thw value of x

we get the answer ->2

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