Question

Plss solved???????'answe r​

Answer 1

Step-by-step explanation:

This is the only answer I can get:

a=given1

a_9=given2

Answer 2

Step-by-step explanation:

mate the value of s9 = 75

hey mate this is your answer :

d = 5 , s9 = 75

s9 = n/2 ( a+an )

we don't know the value of an so we have to substitute the an formula at an place .

sn = n/2 ( a + ( a + n -1 ) × d )

75 = 9/2 ( 2a + 9 - 1 ) × 5

75 = 9/2 ( 2a + 8 ) × 5

75 = 9/2 ( 2a + 40 )

75×2 = 9 ×( 2a + 40 )

150 = 18a + 360

150-360 = 18a

-210 = 18a

-210 / 18 = a

-35 / 3 = a ( in points 11.6 = a )

a9 = a + 8d

a9 = -35 / 3 + 8 × 5

a9 = -35 / 3 + 40

do the lcm

a9 = -35 + 40 /3

a9 = -35 × 1 + 40 × 3 / 3

a9 = -35 + 120 / 3

a9 = 85 / 3

a9 = 28 . 3