Question

Answer to the above three quetions plz plz plz11 12 nd 13​

Answer 1

Answer:

Sorry for answering only one

But hope it helped you...

Answer 2

$\large\boxed{\fcolorbox{blue}{yellow} {Answer}}$

13)

Remaining answer:-

[ a + d ( m + n) - d × 1] = 0

.°. a [ ( m + n) - 1] d = 0 ..... (1)

Now,

n = m + n ..... ( given)

. °. tn = t m+n

. °. tn = a + ( n - 1) d ..... (Formula)

.°. t m+n = a + ( m + n - 1) d

$\bold{\boxed{t m + n = 0 }}$ ..... ( From 1)

Step - by - step explanation

$\large\boxed{\fcolorbox{blue}{yellow} {See the attachment }}$

Hope it helps!

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