Question

1+3+5.find sum upto 10 terms.​

Answer 1

Answer:

1+3+5= 9

answer is right

Step-by-step explanation:

Hope itz helps u

Answer 2

The sum of first n terms of arithmetic series formula is given by the formula,

Sn=2n[2a+(n−1)d]

Where n = number of terms =10

a= first term =1

d= common difference of A.P. =3−1=2

On substituting the given values in the formula, we get

S10=210[2×1+(10−1)2]

=5[2+18]

=5[20]

=100

So, the sum of first 10 terms of the A.P. is 100