Question

give me ans please.....​

Answer 1

$\huge \red{\mathfrak{solution}}$

Given:

◆t10= 20

=>a+9d=20----(i)

Or

◆t9=18

=>a+8d=18---(¡¡)

To find :

◆ Common difference (D)

Subtract both the equation , we get

◆ a+9d=20

◆ a+8d=18

- - -

_____________

d=2

=> d =2

Hence the value of D is

$\huge \: \boxed{ \green{2} }$

Answer 2

$\bold{\large{\underline{\underline{\sf{StEp\:by\:stEp\:explanation:}}}}}$

Given:

» t9=18

» t10= 20

•a+9d=20______________(1)

Or

t9=18

•a+8d=18_______________(2)

To find :

Common difference (D)

Subtract both the equation , we get

a + 9 d = 20

a + 8d = 18

- - -

_____________

d=2

______________

Hence the value of D is 2