Question

Consider the arithmetic sequence 10,14,18
a. What is the common difference
b. What is the algebraic form of sum of the sequence
c. How many terms should be adding starting from the first to get the sum 330
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Answer 1

Answer:

4 , arithmetic progression,78

Answer 2

Answer:

common difference=4

algebric sum=42

79 terms should be added after 18 to get the sum 330

Step-by-step explanation:

Common diff:

 18-14=14-10=4

Algebric sum:

 10+14+18=42

No. of terms:

   a=10,d=4,sum=330

 In AP,

  Sum=a+(n-1)*d

  Therefore,

    330=10+(n-1)4

    n=81

81 terms should bee added after 10 or 79 terms from 18 to make the sum 330