Question

Step-by-step answer, please.

Answer 1

It forms a arithmetic sequence

• First term=a=2
• Common difference=d=-3

So

a_335:-

• a+334d
• 2-(334)(3)
• 2-1002
• -1000

So

S_n

• n/2[a+l]
• 335/2[2-1000]
• 335/2[-998]
• 335(-499)
• -167165

Answer 2

-335670

Explanation:

Given :

• a₁ = 2
• 
  `a_(i) = a_(i-1)-3`

Solving :

• Sum of an arithmetic sequence is given by
• S₃₃₅ = 335/2 x 2(2) + (335 - 1)(-3)
• S₃₃₅ = 335/2 x -4008
• S₃₃₅ = 335 x -2004
• S₃₃₅ = -335670