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Q.

Find the 10th term from end for the A.P. 3,6,9,12,....300


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a

270

b

273

c

276

d

279 

answer is B.

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Detailed Solution

Tn=a+n-1d
300=3+(n-1)(6-3)
300=3+n-13
297=3(n-1)
n=100
10th term from end=n-10+1
=100-10+1
=91th from the beginning
T91=3+91-13
=3+903
=273
 
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