Question

the sum of first 15term of the series 1+2+3+......+15

Answer 1

Answer:

z

Step-by-step explanation:

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Answer 2

Answer:hello... according to the updated syllabus of class 10 sum of AP is deleated

Step-by-step explanation:

S= n/2 (a+l)

=15/2(1+15)

=15/2 × 16 (cut 2 and 16 to get 8)

=15×8

=120.....answer

Hope it helped you