find the sum of first 33 multiple of 9
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Answered by
1
Answer:
5049
Step-by-step explanation:
It'll be an Arithmetic Progression going like
9,18,27....... upto 33 terms
Sum of AP = (n/2)*(2a + (n-1)*d)
= (33/2)*(18+32*9)
= (33/2)*(18+288) = (33/2)*(306) = 33*153 = 5049
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