13. Find the sum of the first 15 multiples of 8.
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Answered by
3
Step-by-step explanation:
you can solve it as follows:
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Answered by
1
Answer:
97
Step-by-step explanation:
tn=a+(n-1)d.
Here, tn =15
d=8
=15=a+(15-1)8
=a+14×8
=a+112
=112-15
=97.
I think it's helpful for you.
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