Question

Find the sum of first 22 terms of an A.P. in which d = 22 and a₂₂ = 149.

Answer 1

Answer:

-1738

Step by step explanation :

given that

a22=149 and d=22

a+21d=149

a=149-469

a= -320

Now we know that

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

S22= 22/2[2*-320+(22-1)22]

S22=11(-640+462)

S22=11(-158)

Therefore

S22=-1738

Answer 2

here is ur answers mate..........