Question

Help and hurry !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

I’m pretty sure it’s the 4th one

Answer 2

The expression is, B)

Explanation:

Since, the sum of an A.P. is,

Where, n is the number of terms,

a is the first term of the A.P. ,

is the last term of the A.P. ,

Here, we have given,

a = 102, = 159, and n = 20,

Thus, the sum of the given A.P. is,

Which is the required expression.