(iii) First term of an AP is 2 and the sum of all terms is 30450, No of terms is 174. Then last
term is
(a) 342
(b) 346
(0)350
(0) 172
Answers
Answered by
1
Step-by-step explanation:
its answer is 348 you didn't write 348 in option
Attachments:
Answered by
1
Answer:
348
Step-by-step explanation:
a=2
S174=30450
Sn= n/2 (2a+(n-1)d)
S174 = 174/2 (2×2+(174-1)d)
30450= 87 (4 + 173d)
30450/87 = 4+173d
350 = 4+173d
173d = 350-4
173d = 346
d = 346/173
d = 2
T174 = a+(n-1) d
= 2+(174-1)2
= 2+173×2
= 2+346
= 348
Last term = 348
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