Question

solve this plzz mate

i posted 3 time ​

Answer 1

Answer:

Combine like terms 6(2n−1)/ n sorry if this wrong m8

Step-by-step explanation:

Answer 2

Step-by-step explanation:

here d is( 4 - 2/n) - ( 4- 1/n) equals - 1/n

a is (4 - 2/n)

n is n here

formula

Sn equals n/2( 2a. + (n-1)d)

n/2(2(4 - 2/n) + (n -1)(-1/n))

4n - 2 - n/2 + 1/2

7n/2 - 1/2

7n-1) / 2