Math, asked by nwaujufaith, 10 months ago

Evaluate(sum_{r=1}raise to power 4 r raise to power 2)

Answers

Answered by gautamkumar118
0

Answer:

Please repost this question in good manner.

Answered by assisinghpal
1

Answer:

For any x≠1 we know

xn+1−1=(x−1)(xn+xn−1+…+1).

So

∑k=0nxk=xn+1−1x−1

Now since your sum starts at 41 not 40, you need to subtract 1 in this case to see that

∑k=1104k=(411−1)/(4−1)−1

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