Question

Sum of first 10 terms of an ap 3,5,7,9 is

Answer 1

Answer:

a=3

d=5-3=2

n=10

S=n/2[2a+(n-1)d]

S=10/2[2*3+(10-1)2]

S=5[6+9*2]

S=5[6+18]

S=5[24]

S=120

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Answer 2

Answer :- 120

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