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The 10th term of an AP is 32. If the first term is 3/2, what...

Mathematics
JAMB 2022

The 10th term of an AP is 32. If the first term is 3/2, what is the 4th term?

  • A. 35/3
  • B. 64
  • C. 16
  • D. 35/2
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Correct Answer: Option A
Explanation

Tn = a + (n-1)d

10th term = 32

32 = 3/2 + 9d 

9d = 32 - 3/2

9d = 61/2

d = 61/18

: T4 = 3/2 + 3(61/18)

T4 = 3/2 + 61/6 → 35/3

 

There is an explanation video available below.


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Explanation Video

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WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709