The first and last of an a. p are 1 and 121 A. Find the number of term in the a. p
B. Find the common different between them if the sum of it's term is 549

third option: 6x+8

step-by-step explanation:

we can see that the given question is a sum of series and the values of n vary from 0 to 3

the first term will be:

when n=0, [(0)*x+2] => (0+2) => 2

when n=1, [(1)*x+2] => (x+2) => x+2

when n=2, [(2)*x+2] => 2x+2

when n=4, [(3)*x+2] => 3x+2

so adding up all the terms will give us:

=2+x+2+2x+2+3x+2

=x+2x+3x+2+2+2+2

=6x+8

so,

third option is the correct answer ..

vbbv

step-by-step explanation:

its c or d   take a lucky guess my dude

they would have to work 32 hours.