Question

If the 10th term of an ap is 47 and its first term is 2 find the sum of its 15 term

Answer 1

Answer:

An= a + (n-1)d

47=2+9d

5=d

sn = n/2(2a+(n-1)d)

=15/2(4+14*5)

=555

hope it helps you dear

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