Find the 17term of the Arithmetic Progression (A.P):-6,-1,4

  • A -91
  • B -86
  • C 74
  • D 79
waec 2022mathematics

The correct answer is C. 74

common difference d =  -1 - [-6] â†’ -1 + 6

d = 5; a = -6

T\(_n\) = a + (n-1)d

: T\(_{17}\) = -6 + (17 - 1) 5 

→ -6 + (16)5

→ -6 + 80 = 74

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