Question

http://s22.postimg.org/6q6l7kqw1/image.jpg Can someone explain these? I dont rly understand when its sum (i do when i need to multiply )

Answer 1

ur guesses

Answer 2

Um for example 81: 2^3/6 + 2^1/2?.. But what next?

Answer 3

Hmmmmm.....(im thinking)

Answer 4

8^(1/6) + 2^(1/2)
8^(1/3)*(1/2) + 2^(1/2)
2^(1/2) + 2^(1/2)

2^(1/2) = square root of 2

In other words,

Square root of 2 plus square root of 2 is 2 times square root of 2

Answer 5

= (2^(3^3)^1/4) ^ 3^(1/4)
= (2^(3^3/4) ^ 3^(1/4)
= (2)^3
= 8

Answer 6

C. Is equal to 2 but I want you to work it out yourself

Answer 7

Sorry I meant 82