Question

S22,if d=2 and a22=149

Answer 1

Heya !!



Common difference ( D ) = 2



And,



A22 = 149


A + 21D = 149



A + 21 × 2 = 149



A + 42 = 149



A = 149 - 42


A = 107


First term ( A ) = 107


Therefore,



S22 = 22/2 × [ 2 × 107 + ( 22 - 1 ) × 2 ]




=> 11 × ( 214 + 42 )



=> 11 × 256


=> 2816 [ Answer ]

Answer 2

Hello dude !

♠ Here is your answer ♠

____________________________________________________________________________________

d = 2

A22 = 149

A + 21D = 149

A + 21 × 2 = 149
A = 149 - 42

A = 107

First term= 107

S22 = 22/2 × [2 × 107+( 22- 1 ) × 2]

=11 × ( 214 + 42 )
=2816.

♥ Hope it helps ♥