Let us look at the following triangular ...

Let us look at the following triangular arragements of dots. First row has one dot,second row two dots and so on and throw will have n dots. Let L, be total number of dots in such a triangular arrangement of nrows of dots. Answer questions 16 and 17 below

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Let us look at the following triangular arragements of dots. First row has one dot,second row two dots and so on and throw will have n dots. Let L, be total number of dots in such a triangular arrangement of nrows of dots. Answer questions 16 and 17 below

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