3 years ago

How many 4-digit combinations of numbers are there such that no digits repeat and all of the digits are from 0 through 9?

Mathematics

1 answer:

SashulF [63]3 years ago

3 0

$10\cdot9\cdot8\cdot7$

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Answer:

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Step-by-step explanation:

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it kinds looks weird on here but write it out on paper

then cross multiply:

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bearhunter [10]

Write a recursive rule for the sequence.

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STEP 1:

a1 = -2

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STEP 2:

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STEP 3:

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