Write the sum using summation notation, assuming the suggested pattern continues. 343 + 512 + 729 + 1000 + + n3

Step-by-step explanation:

Each of the terms of the sum is a cube. The first is 7³, the next is 8³, then 9³ and 10³. So, we presume the pattern is consecutive integers from 7 to n, each one cubed.

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation:

5+2x=a

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