12.Sum of first 5 multiples of 3 is
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Answered by
1
Answer:
45
Step-by-step explanation:
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Answered by
1
S=30
Step-by-step explanation:
S=n/2(2a1+(n-1)d)
S=5/(2*3+(3-1)3)
S=5/2(6+6)
S=5*12/2
S=30
n=5 a1=3 d=3
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