Question

find the indicated term of the following sequence 1) an= 4n-3;a7 and a10 2)an=(-1)n×5n;a2,a5 and a10​

Answer 1

Step-by-step explanation:

Given find the indicated term of the following sequence 1) an= 4n-3;a7 and a10 2)an=(-1)n×5n;a2,a5 and a10​

• Given an = 4n – 3. We need to find a7 and a10
•     So a7 = 4(7) – 3
•               = 28 – 3  
•                = 25
•    So a10 = 4(10) – 3  
•                 = 40 – 3
•                 = 37
• Also given an =( -1)n x 5n
•          So a2 = (- 1)2 x 5(2)
•                  = - 2 x 10
•               = - 20
•      Also a5 = (- 1) 5 x 5(5)
•                  = - 5 x 25
•                = - 125
•   Also a 10 = (- 1) 10 x 5(10)
•                    = - 10 x 50
•                   = - 500

Answer 2

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