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Snezhnost [94]
3 years ago
15

1^2 + 4^2 + 7^2 + ... + (3n - 2)^2 = n(6n^2-3n-1)/2

Mathematics
1 answer:
vlabodo [156]3 years ago
7 0
Use math induction proof method will be usefully 

for n=1 will get 

1^2 = 1(6*1^2 -3*1 -1)/2
1 = 1(6-4)/2
1 = 1(2)/2
1 = 1

suppose true for n=k and prove for k = k+1 

hope this will help you 
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i hope this will help you :)

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Step-by-step explanation:

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The angle of the triangle are in the ratio 5:6:9 what is the measure of each angle
sveta [45]
The angles are in the ratio of 5:6:9.
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5x, 6x, and 9x.

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and
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8 0
3 years ago
In a class of 30 students, 12 are girls. One-third of the boys study history.
frosja888 [35]
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