[Mathematics] What is the seventh power sum formula (analogy cube and formula)?

Usually I don't say anything about the seventh power and formula.

In fact, this problem is mainly caused by a? +b？ =2，a+b= 1。 You can know how many ab's there are. With this, you can find out how much a3+b3 and a4+b4 are equal.

a7+b7=(a3+b3)(a4+b4)-a3b3(a+b)

You made the rest yourself.

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