2 years ago

Find the sum of the first 47 terms of the following series, to the nearest integer. 9,18,27,...

Mathematics

2 answers:

luda_lava [24]2 years ago

9 0

18 is the answer hood this will help you

Shkiper50 [21]2 years ago

3 0

Answer:

10152

Step-by-step explanation:

Common difference:

18-9=9

27-18=9

d=9

Explicit formula:

an = a1 +(n-1)d

a47 = 9+ (46)(9)

a47 = 423

Find sum: Sn = n(a1+an)/2

47(9+423)/2

47(423)/2 = 20304/2 = 10152

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