hello yes i read it but it's quite vague can you help me how to do it step by step? i've been searching the web but can't find site that will help a dummy like me

i cant find any website can you please direct me?

any tutorial or website to help me...i want to get the time complexity of this algo using summation and big o...i really find it difficult to understan...can you help me please solve step by step
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