Correct Answer: Option C

Explanation

nth term of a linear sequence (AP) = a+(n − 1)d

first term = 6, last term = 10 sum − 40

i.e. a = 6, l = 10, S = 40

S\(_{n}\)= n/2(2a + (n − 1)d or Sn = ÷2 (a + l)

S\(_{n}\) = n/2(a + l)

40 = n/2(6 + 10)

40 = 8n

8n = 40

8n = 40

n = 40/8

= 5

The number of terms = 5

There is an explanation video available below.

• Does WAEC give Calculator to student for there exam? Answer this

  3 Answers   ·   Mathematics   ·   3 days ago
• find the value of (16)^3/2 + log0.0001 + log325? Answer this

  13 Answers   ·   Mathematics   ·   10 years ago
• What can i study with 155 score in science course? Answer this

  1 Answers   ·   Biology   ·   2 days ago