Use \large S_n=\frac{n}{2}\left(a_1+a_n\right) or \large S_n=\frac{n}{2}\left(2a_1+d\left(n- 1\right)\right) to find the sum of the arithmetic series when, \large a_1=35, \large a_n=105, and \large n=8

Sum =

560

Step-by-step explanation:

Given Sum = n/2{a1+an}

Govn the following

a1= 35

an = 105

n =8

Substitute into the expression

Sn = n/2(35+105)

Sn = n/2(140)

Sn = 70n

Sn = 70(8)

Sn = 560

Hence the sum of the AP is 560

an

y = 6x -3y -12

y +3y +12 = 6x

=> . x = { 2y / 3 +2 } this is equation of line in terms of x

=> . if line meets the x-axis the co-ordinates of meeting point would be ( x , 0 )

=> . x = 2 ( 0 ) / 3 + 2

=> . x = 2

so, the point is ( 2 , 0 )

sadsdda

step-by-step explanation: