Question

3 च्या पहिल्या पाच पटींची बेरीज ...........आहे. (A) 45 (B) 55 (C) 15 (D)
75 ​

Answer 1

Answer:

Obviously, iska answer option(c) 15 hogi

Answer 2

Answer:

45

Step-by-step explanation:

The given sequence is 3,6,9...

Here,

a=3

d=3

n=5

Therefore,

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

S5=5/2(2a+(5-1)d)

=5/2(2(3)+4(3))

=5/2(6+12)

=5/2(18)

=45

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