Question

1) In an A.P first two terms are -3 and 4 then it's 21st term will be______

Answer 1

Answer:

137

Step-by-step explanation:

a=-3

a2=4

d=4-(3)

4+3

  =7

a21 = a+20d

=-3+20*7

=-3+140=137

hope it helps.....

Answer 2

Answer:

In an A.P first two term are -3 and 4 then it's 21st term will be 137

-----

Step-by-step explanation:

The first term (a) = -3 ,

The common difference (d) = t2 -t1

= 4 -(-3)

= 4 + 3

= 7

We know that,

tn = a+(n - 1) ×d

t21 = -3 +(21 - 1) × 7

t21 = -3 + 20(7)

t21 = -3 + 140

{ t21 = 137 }

Therefore,the 21st term is 137

Hope this answer help you

Mark as brainliest answer plz