Question

the 21 term of the ap who's first two term are -3 and 4 is ​

Answer 1

Step-by-step explanation:

if 1st term is -3 and 2nd term is 4 then common difference will be 7

tn=a+(n-1)d

t21=-3+(21-1)7

t21= -3+20x7

t21= 140-3

t21=137

hope it help you

Answer 2

let a1 = -3 and a2 = 4

therefore d = a2 - a1

= 4 -(-3)

= 4+3

d = 7

21 st term a21 = a + 20d

= -3 +20*7

= -3+140

= 137