juwon68 juwon68
  • 14-05-2021
  • Mathematics
contestada

The first term of an AP is 2 and the
common difference is 3. Find the sum
of the first 11 terms. (JAMB]​

Respuesta :

spectrojamz
spectrojamz spectrojamz
  • 15-05-2021

Answer:

Sn = n/2[2a + (n-1)d]

n=11

a=2

d=3

Sn= 11/2[2(2) + (11-1)3]

Sn= 11/2(34)

Sn = 11x17

=187.

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