Question

find the sum of ‘n’term of the series 1×2+2×3+3×4+4×5---------​

Answer 1

Answer:

580 answer

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Answer 2

Answer:

mark me as brainliest.

Step-by-step explanation:

1×2+2×3+3×4+4×5

2+6+12+20

8+12+20

20+20

40