Question

find the sum of 10 terms of AP 2,5,8,11,...
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Answer 1

Step-by-step explanation:

by using sum of first n terms,

S_n = \frac{n}{2}[2a+(n-1)d]

Answer 2

Answer:

Hello dear ❤️

given,the AP is 2,5,8,11.....

here,a=2

d=t2-t1

=5-2

=3

n=10

now,

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

=10/2(2*2+9*3)

=5×(4+27)

=5×31

=155

•°•Sum of 10terms of the AP is 155.

Step-by-step explanation:

Thanks for asking ☺️

MARK AS BRAINLIEST